translation from CP437 -> UTF-8 and only when using high-level text output
functions - so the output from native/DOS doors and scripts that use low-level
output methods won't be translated.
UTF-8 is auto-detected (only) at this time during answer (before login) by
sending a ZWNBSP and checking (via ANSI) if the cursor position moved - an
idea "borrowed" from Ozz Nixon (aka SqZ).

This commit requires the new "encode" library (src/encode), so you may need
to perform a cvs checkout to get that module!

- for PETSCII, this is automatic and you don't lose blink, but you do lose
  colored foreground when enabling a bright background ("reverse video")
- for ANSI, this mode is typically referred to as "iCE colors" and disables
  blinking-text support
- Ctrl-AE (^AE) is the new attribute code to enable bright-background
  (will have no effect on ANSI terminals that are not iCE color enabled)
  "E" is now valid in the ctrl/attr.cfg file and string values for JS
  console.attributes assignments, as well
- Ctrl-AI (^AI) - blink - now does nothing for ANSI/ICE color terminals
  (blinking is not supported in combination with bright-background)
- Using a new/non-standard CGA attribute bit-flag to indicate the selection of
  bright-background colors (BG_BRIGHT, bit 10), separate from BLINK.
  This change required all/most char/uchar attribute representations to be
  converted to int/uint.

New text.dat strings:
- PetTerminalDetected (renamed from PetTermDetected)
- PetTerminalQ
- TerminalAutoDetect
- TerminalColumns
- TerminalRows
- TerminalMonochrome
- TerminalColor
- TerminalIceColor
- IceColorTerminalQ
This also moved the MsgCarbonCopyList definition to the end of the file
for now.

PETSCII reverse-video attribute fix:
When a CR is sent to the terminal, the reverse-video attibute is auto-disabled
so update our "current attribute" (curatr) value to match the remote.

Support new printfile/putmsg mode flag: P_WRAP to force an ungraceful
line-wrap (splitting) to the specified column width. If no column width is
specified (0), then this mode will force an ungraceful wrap before the last
terminal column where some terminals *may* auto-wrap.

JS console.printfile() and printtail() methods now support an optional
"orig_columns" argument, similar to console.putmsg(). Must specify P_WORDWRAP
or P_WRAP for this argument to have any effect.

Much improved terminal-type selection/configuration in the user defaults
menu and abort (^C) at any of the yes/no prompts is now detected/handled much
better (to answers to the prompted questions are not saved to the user
settings).

when set, force a clear-to-end-of-line sequence to be sent to the remote
terminal before sending a carriage-return (CR, '\r') character. This is useful
in scenarios where you want to move/home the cursor and *not* clear the screen
and then display or execute something that assumes clean lines are being
displayed on and thus wouldn'd bother with any clear-to-eol sequences before
line-endings.
Any scripts that enable this mode should disable it upon exit (e.g. using
js.on_exit() to restore the original console status).

will be sending 0x7f (DEL) when the backspace key is struck: SWAP_DELETE
For example, xterm sends 0x7f when backspace and hit and an ANSI escape
sequence when the DEL key is hit.

I don't yet have a way to *enable* this setting.

Also, allow the user's setting of NO_EXASCII to take effect even when
auto-terminal type detection is used (yes, the user's terminal can support
ANSI and *not* CP437).

- getnameinfo() was being called with NI_NUMERICHOST in the mail server and
  web server (but nowhere else)
- use a singly-defined macro (STR_NO_HOSTNAME) for the "<no name>" string
  rather than copying it about
- the webserver apparently assumes that session->host_name will always have
  *some* unique value (e.g. the IP address when no hostname is available) - so
  account for that special need <grumble>

(default: off) - when enabled, the current terminal width (columns) will be
saved in the msg header.
When using the internal msg editor or raw intput mode, the columns are always
saved in the message editor. fseditor.js should have this option enabled.

intercepted output to stderr won't be logged.

Since QUOTEWRAP *is* used, just define that bit flag specifically.

network hub call-outs and timed-events.

(JS bbs.post_msg()): If the WM_QUOTE mode flag is *not* set, then it will auto-
create the quote file (quotes.txt) and add the WM_QUOTE mode bit before calling
sbbs_t::writemsg(). So if existing JS scripts call bbs.post_msg(..., WM_QUOTE)
with a custom-created quote file (e.g. with msg tails), that'll still work as
before (e.g. DDMsgReader.js).

bbs.email() and bbs.netmail() now support an optional reply_header_object
argument which works like bbs.post_msg(). These methods (and the underlying
C++ methods: sbbs_t::email(), netmail(), inetmail(), all auto-create the
quote file now, when the WM_QUOTE mode flag is *not* set.

The auto-created quotes.txt now includes the plain-text version of MIME-encoded
messages.

the bbs.post_msg(), email(), and netmail() methods now all support reply
header objects that came directly from bbs.get_msg_header() *or* copies of
such header objects (but the auto-quoting feature won't work when supplied
this type of header object). So if passed a header object returned from
bbs.get_msg_header(), we can now use the message base (for auto-quoting) and
the underlying msg storage directly (no JS parsing necessary). This is what
the new js_GetMsgHeaderObjectPrivates() function is used for.

js_ParseMsgHeaderObject() (and the underlying parse_header_object() function)
now supports either an actual internally-generated msg header object (e.g.
returned from bbs.get_msg_header()) or one that is a copy or hand-constructed.

quotemsg() no longer tries to get a copy of the msg index/header. It shouldn't
have to since we can now get to underlying msg storage in the js_msgbase.c
via js_GetMsgHeaderObjectPrivates().

quotemsg() now reads only the plain-text portion of MIME-encoded messages.

As part of this effort, I modernized the method prototypes using default
argument values (e.g. WM_NONE for wm_mode arguments) and removed some
extraneous WM_EMAIL and WM_NETMAIL specifications (these wm_mode flags are
automatically added by the sbbs_t::email() and *netmail() functions).

savemsg() now *does* support reply-IDs/thread-linkage via the additional
'remsg' argument (when non-NULL).

Replaced some use of nulstr with NULL.

Replaced more boilerplate SMB open code with calls to smb_open_sub().

Incremented copyright year to 2019.

normal (chronological) order of the returned mail indexes.

now have their output translated to PETSCII equivalents for PETSCII terminals
(but input is not yet translated).
.seq files are now sent untranslated via printfile() and putmsg() to PETSCII
terminals (using the new P_PETSCII putmsg mode flag).
.seq files (and P_PETSCII mode text printed via putmsg) is now converted
(poorly) from PETSCII to CP437 - this is still a work-in-progress.
Remove the remants of WIP and HTMLterm support from putmsg() and printfile().

means no error message will be displayed/logged if the referenced file does
not exist.

So Omegix recently asked in the Synchronet Discussion group whether or not
a PETSCII (Commodore) terminal could be used to access his Synchronet BBS.
Now, the answer is "Yes". :-)
The major issues addressed:

- detecting a PETSCII terminal, solved by assigning specific (configurable):
  TCP ports to be used for incoming PETSCII connections, by default:
  port 64 is for 40-column PETSCII and port 128 is for 80-column PETSCII,
  but if the terminal sends a Telnet Window Size reply (e.g. SyncTERM), then
  either size terminal should fine on either port.
  The port numbers are configurable in the [BBS] section of your sbbs.ini
  file using the new keys: PET40Port (default value: 64) and PET80Port
  (default value: 128). Having these keys set doesn't make make the terminal
  server listen on that additional port - you'll need to add more
  IP:port combinations to one of Interfaces values, example:
    TelnetInterface=71.95.196.34,71.95.196.34:64,71.95.196.34:128
  And you don't have to use Telnet for the PETSCII connections - you could use
  RLogin or SSH instead (or in addition).

- support for terminal widths < 80 columns:
  This was achieved through a combination of text.dat changes (numerous),
  new Ctrl-A and @-codes and new optional terminal-width-specific menu files
  (e.g. text/menu/main.40col.asc)
  A side effect of these changes is actually better support for terminals
  *wider* than 80 columns as well!

- support for terminals that don't expand tabs to spaces (e.g. PETSCII):
  The terminal server now handles tab expansion with a run-time settable
  tab-size (default size: 8)

- conditional access based on PETSCII (or small) terminal use (or not):
  + New PETSCII ARS keyword (boolean)
  + New COLS and ROWS ARS keywords (for terminal width and height requirements)
  + New TERM (string) ARS keyword

New @-codes:
  - WORDWRAP, when placed at the top of a file, enables auto-wordwrap for
              lines longer than the terminal width
  - CENTER, the text following before an end of line will be displayed centered
            on the terminal (whatever the width, in columns)
  - CLEAR, like CLS, except it ignores (doesn't display) a CRLF that follows
  - COLS, current number of terminal columns (width)
  - ROWS, current number of terminal rows (height)
  - TERM, the auto-detected or reported terminal type (e.g. ANSI, TTY, etc.)
  - SYSONLY, toggles "echo" (display) off/back-on for non-sysops
            similar to the Ctrl-A( and ) codes, but more convenient to use
            (and PabloDraw won't strip the @-code from the file like it does
             with Ctrl-A codes it doesn't support)

New Ctrl-A codes:
  - \ conditional new-line/continuation when the terminal width is < 80 cols
      prints the new text.dat string LongLineContinuationPrefix

yesno() will now return true if passed a blank string.
noyes() will now return false if passed a blank string.
getstr()'s input length limiting based on terminal width is more broadly
           applied now (not just when using the K_LINE mode flag).

New JS bbs object method: menu_exists(<base_filename>) returns Boolean
New JS console object property: tabstop (Number)
New JS console object methods: getbyte() and putbyte() to recv/send raw byte
    value with (very little) interpretation/intervention by the terminal server
New JS console object method: creturn() - performs a carriage return
    (or equivalent)
New JS (and C) printfile() mode flag: P_TRUNCATE, causes long lines to be
    truncated, rather than displaying causing a line-wrap.

New text.dat strings:
  - NoAccessTerminal (for ARS check failures)
  - LongLineContinuationPrefix (for breaking long lines for 40col terminals)
  - Scanning (replaces a previously hard-coded "Scanning" string)
  - Done (replaces a previusly hard-coded "Done")
  - Scanned  (when finished scannning, clears the progress bar)

terminal text and attributes with a linked-list. In doing so:
- the save depth is no longer fixed (at 4), but dynamic and unbounded
- the current column position is also saved/restored (bug fix)
- no more copy/pasta from sbbsdefs.h into js_console.cpp
- the JS console.saveline() and restore() methods now return Bool to indicate
  success/failure

Also, some trailing white-space was auto-removed due to local editor settings.

from both ends of the input string automatically and disallow (ignore)
more than one consecutive space character mid-string.
The returned value is still the non-trimmed string length - perhaps that
should be changed.

If a message sub-board is configured to "Allow Message Tagging"
(under Toggle Options in SCFG->Message Areas), then after a message is
posted (via the terminal server), the user will be prompted if they
want to tag the message with one or more space-separated tags. The no/yes
prompt can be skipp if desired by setting the TagMessageQ line in the
text.dat file to an empty string. There is currently no provision for
regular users to actually see/view the message tags (yet), but the sysop
or sub-op can view the tags in the message header with the 'H' sys/sub-op
command.

Most of the copyright years in the source code were misleading (the date of
most recent publish was actually later) and all were unnecessary. I've been
removing copyright years piecemeal, for a long time, but I decided it was time
to just perform a bulk search and (mostly) replace. In some cases, I left
old copyright years on files that either are not used (and soon to be removed)
or obsolete and unlikely to ever be touched again (e.g. Win9x FOSSIL VXD). Some
of the runtime binaries still contain copyright years and those were updated to
2018.

the sysop must now enable this feature in SCFG->Networks->FidoNet.

Over-hauled the ANSI detection a bit too.

and Ctrl-N (next) instead Ctrl-U and Ctrl-D as that wasn't going to work with
fseditor.js's (Ctrl-U is quote).

sequence is currently just the <esc>[V and <esc>[U sequences (supported by
SyncTERM).

Server via the new 'V' command from the Reading Mail prompt allows you to
toggle between all mail (including SPAM, the default), SPAM only, or HAM only.
Also added a new '/' (search text) command from the reading mail prompts.
Mail imported before the mailsrvr added support (recently) for the MSG_SPAM
attribute flag will not be counted/filtered as SPAM.
SBBSecho will have a commit (next) to support the new loadmail() usage, it
will not compile until then.

  Automatically detect child sub-directories and make them available as virtual
  directories for users to download from - only useful via FTP currently.
* Implemented Sorting options for Message Groups and File Libraries:
  Sub-boards within groups and directories within library can now be
  automatically sorted based on the sysop's chosen sort field (long name, short
  name, or internal code)
  - Required that sub-boards are now stored/saved in msgs.cnf based on groups
  - Required QWKnet hub sub-board reference dynamic renumbering
* Implemented "Template" toggle option for sub-boards and file directories:
  A sub-board or directory marked as "template" will be used for newly created
  (or imported) subs/dirs for that group/lib. Clone Options via SCFG will now
  use the "template" item as the source of the cloned settings, if available.

Using this flag swaps the alias and real-names as passed in the first 2
fields of the RLogin authentication/negotiation (client-user-name and
server-user-name).

(currently only via FTP) - simiilar to the global FTP option: DIR_FILES.
I intend to extend this option to the terminal server as well.

If anybody actually hit these limits I'd be impressed, but it's not impossible.
65535 (-1 as an int16_t) is a special value used to indicate an "invalid" item.

globally (using a new macro in sbbbsdefs.h: STR_UNKNOWN_USER). "<unknown>"
in some contexts was too vague (e.g. the 'c' command output from the sbbs
console).

Removed some unused constant definitions/macros.
Updated copyright date (to 2016).

no longer ignores Ctrl-Z characters (CP/M EOF) by default. If you want the
old behavior (Ctrl-Z characters not displayed, just skipped), specify the
P_CPM_EOF mode flag.

function where the error is being reported from. So the WHERE macro now
contains the __FUNCTION__ "macro" and the various js*.c files that use the
WHERE macro to report errors had to be updated too.
Also, the 'access' argument is now being passed as a signed long rather than
unsigned long. Status/return values are often passed in here (e.g. from smblib)
and may be negative. This argument was being displayed with %ld but wasn't
being passed in as a signed value, so on 64-bit long systems, negative numbers
were just printed as large (4M+) numbers.
Also, no need to call getfname() in errormsg() since this is embedded in the
WHERE macro (since 2009).

Introduced a better progress indicator (similar to poll results), using the
backfill() method. 2 new attr.cfg fields allow the progress indicator colors to
be configured separately from poll results (though they default to the same
white on magenta). This new progress indicator is used when loading msg ptrs
and scanning for votes. I will be using it while performing other searches
(e.g. file libraries/dirs) as well.

- Include Kludge Lines     (Yes)
- Include VOTING.DAT File   (Yes)
- Include HEADERS.DAT File   (Yes)
- Extended (QWKE) Packets    (No)
- Exported Ctrl-A Codes    (Strip)

SBBS/QWKnet nodes now have more control over the REP packet files created
by their systems. If the "uplink" (hub) is complaining about receiving
unsupported files (e.g. VOTING.DAT) or kluge lines (e.g. @TZ), just turn them
off.

Also, Ctrl-A codes may now be retained in QWKnetmail. And the @REPLYTO kludge
line enabled for the first time (!).

New MsgBase header propeties:
- total_votes (total number of votes this msg or poll has received)
- tally[], an array of 16 numbers indicating the total votes for each poll answer
  in the case of a normal message, tally[0] is the same as upvotes and tally[1]
  is the same as downvotes.
This should complete what echicken needs to display polls and voting results
in his web UI.

be used in displaying poll results.