write_file_cfg(). I'm pretty sure this fixes the bug introduced in r1.75
(Mar-7-2018) where it would use the directory's custom "data dir" as the
parent of the sub-directory even if it was blank.

So if you're like Mark Lewis and you're getting a bunch of sub-directories
created in your "ctrl" directory when you save changes in SCFG, this is likely
the cause. Only happened if you had both the library's "Parent Directory"
and the "File Transfer Path" of the directory, blank.

Really only useful on *nix since Windows only allows the setting/clearing of
a single mode flag: user-writeable, 0x80, 0200.

directory's file transfer path, the array index usage here could cause a
crash or just garbage to be displayed.

Path" or "Directory File Path".

Remove it.

CSI Pn Y - Cursor Line Tabulation
CSI Pn SP c - Tab Stop Remove
CSI Pn k - Line Position Backward

Requested by mortifis.

CSI Pn b (Repeat previous char)
	Actually mildly useful... repeat any character.
CSI Ps d (Line position absolute)
	Moves to a specific row without changing column.
	Mildly useful.
CSI Pn a (Cursor forward)
	Identical to CSI Pn C
CSI Pn ` (Absolute position in line)
	Identical to CSI Pn G
ESC H (Add Tab Stop)
	ie: Break everything else that uses tabs this session.
CSI Pn g (Clear Tabs)
	ie: Break everything else that uses tabs this session.
CSI 2 $ w (Request Tab Report)
	So, maybe it can be fixed after you break it!  Yay!
ESC M (Reverse Line Feed)
	Basically up one line.  Not really useful since we have cursor up.
CSI Ps e (Line position relative)
	Identical to CSI Pn B

Fixed possible undefined console.cterm_fonts_active reference.

callers list during logon.
New modopts.ini [logon] option: last_few_callers (default: 4), so you can
customize the number of callers displayed.

using the version to determine what's supported (and isn't).

to have the NO_EXASCII (plain-ASCII only) set if the logged in without a
successful auto-terminal-type detection.
And with sbbs_t::term_supports(), we don't need useron.misc to reflect the
auto-detected-terminal-type any longer.

expanded.

the "darkgray" background issue when using xterm.
Apparently if the foreground attribute has the high intensity attribute set
and a CRLF or a clear-screen sequence is sent, the new (blank) lines (normally,
black) will have the high intensity *background* attribute set (or it just
looks that way). I don't understand why... yet.

 hex escape sequence out of range

clear-screen (CLS) in logon.cpp.
Use of the new ELLIPSIS @-code.

This prevents any auto [Hit a Key] prompt just because we printed the
"Logging on to <bbs> as <user> ..." line.

where the comment was only on the first line.
This only cropped up in the text.h output when the *last* line was a multi-line
(continued) string.

don't move the cursor position.

string: LoggingOn
This was the *first* possible cause of an auto-pause ([Hit a key] prompt)
during successful SSH logins.
The new text string is just "Logging on to @bbs@ as @alias@ @ellipsis@"
- if you want a screen clear here or to display a text file, you can do so by
  modifying this line.

U+ code now supports <code-hex>:<text> syntax so that multiple chars (a string)
may be specified as a fallback for non-UTF-8 terminals.
The U+<code>/<char> syntax was changed to U+<code>,<char>
New symbolic @-codes that send the right Unicode code point to UTF-8 terminals
or a string to others:
- ELLIPSIS
- COPYRIGHT
- SOUNDCOPY
- TRADEMARK
- DEGREE_C
- DEGREE_F

string (multiple) CP437 fallback chars, for when a single CP437 char won't
suffice.

Fix error in CP437 0x96 (small U with circumflex) translation to UNICODE
(typo: 0x00FB not 0x00F8).

Fixed one typo (LATIN_LATIN).