Don't corrupt UTF-8 strings with SAFECOPY() (use new SAFECOPY_UTF8).

Some terminals (notably, Windows Terminal) display zero width UNICODE chars
as a single column-wide space. <sigh> Auto-detect the zero-width "width"
(1 or 0) of the terminal during connection and UTF-8 auto-detection.

getstr() works a lot better now with UTF-8 strings with wide chars (e.g.
emojis), but likely much more to do.

sbbs_t::mnemonics() now supports @-codes immediately following the tilde
(e.g. ~@Yes@) to use the first character of a dynamically-replaced
(e.g. localized/translated) text string as a command key.
Fixed issue in sbbs_t::mnemonics if multiple @-codes were specified in the
string, but no space characters (just noticed this bug while reviewing).

Created: sbbs_t::expand_atcodes() - used by sbbs_t::mnemonics(), exposed in
JS as bbs.expand_atcodes().

bbs.text and system.text now have properties: each text string ID is the
property name and the text index number (1-based) is the property value -
enabling fast text string lookup without load/require text.js

Constified sbbs_t::atcode() and attrstr() - not too painful

Deprecated YNQP text.dat string in favor of (the first character of)
  "Yes" and "No" text strings and new strings: "Quit", and "PasswordChar"

Other text.dat changes: ListKey->List, AllKey->Unused853
More new text.dat strings: Which, Next, Previous, Language, LANG
Deprecate the "AllKey" text string
Create/use sbbs_t::all_key() - first character of "All" text string

New JS console properties that present common (possibly localized) command
keys: yes_key, no_key, quit_key, all_key, list_key, next_key, prev_key

I'll add detailed docs to http://wiki.synchro.net/custom:atcodes soon, but the
list is:

- TERMTYPE
- TERMROWS
- TERMCOLS
- AUTOTERM
- ANSI
- ASCII
- COLOR
- ICE
- RIP
- PETSCII
- SWAPDEL
- UTF8
- MOUSE
- UPAUSE
- SPIN
- PAUSESPIN
- EXPERT
- HOTKEYS
- MSGCLS
- REMSUBS
- FILEDESC
- FILEFLAG
- AUTOHANG
- AUTOLOGON
- QUIET
- ASKNSCAN
- ASKSSCAN
- ANFSCAN
- EDITOR
- SHELL

This should (at least mostly) address the issue #629

e.g. when using Ctrl-K or when being prompted for key-press due to inactivity

Does exactly the same thing, no change in behavior and unlikely there's any change in performance.

Mostly [s]printf format fixups

At one time, Synchronet was a 16-bit DOS project, plagued by the 16-bit [u]int, so long's were used everywhere > 16-bits were known to be needed/wanted (This is before the days of the standard sized types from stdint.h), and they've persisted.

But '[u]long int' is 64-bits on *nix 64-bit builds, 32-bits everywhere else (even 64-bit Windows builds if/when we ever get around to that), so this could lead to insidious bugs that would only show up on one flavor or the other. Since [u]int is 32-bits on everything we currently support, we'll use that instead of [u]long.

This "part 1" because I'm sure there's going to be warnings and errors from the GCC/Clang builds as a result, which I'll get to next.

The interactive prompting for terminal capabilities worked fine,
but the default configuration menu settings did not reflect the
user's previous choices and changes they made (e.g. toggle mouse
support or BS/DEL key swap) were not reflected in the menu. Once
logged in, the normal user defaults menu worked as expected. This
is all because term_supports() keyed off of SS_USERON which isn't
set during new user sign-up, so let's key off SS_USERON|SS_NEWUSER
now.

<server>/state is now published directly to the <sever> topic level (the "state" topic goes away).

Moved <bbs-id>/node# topics to <bbs-id>/nodes/# (allows better wild-card subscription per MQTT standards).
Publishing total node count to <bbs-id>/nodes rather than <bbs-id>/node_count

Introduced "publish verbosity" control (defaults to "High") - if you want nice human readable (and sometimes redundant) topic messages, leave this set to "High". To reduce traffic, set to "Low". It's expected that purpose-built Synchronet/MQTT clients should work equally-well with either setting, but when using generic MQTT clients/browser, "high" verbosity is nice. The human-readable node status is only published when "high" verbosity is enabled.

Publishing the BBS name to the <bbs-id> topic, the instance hostname (as configured in sbbs.ini) to the <host> topic. Makes the hierarchy much more clear when using an MQTT browser like MQTT Explorer.

Each Synchronet server is now its own MQTT client. This means there's no
longer any MQTT logic in the Synchronet "hosts" (e.g. sbbscon.c, ctrl/*.cpp)
and none needed for SBBS NT services (they'll "just work" with MQTT).

This also means that just about everything (except for nodes, spam and hack)
is now published per-server (in the sbbs/BBS-ID/hostname/server/ topic branch)
and if you want aggregated totals or client lists, you'll have to do that in
your own MQTT client or dashboard.

I also removed the publishing of thread_count and socket_count topics as
they weren't universally supported across all servers and are of questionable
value. They can be added back later if determined to be useful.

Now support subscriptions (e.g. recycle topics, node input topics) in SBBSCTRL.
This required a lot of search/replace and fun with circular struct pointers.

This is to avoid the error reporting/logging that results.

Requires libmosquitto (e.g. install mosquitto-dev pkg) and set
in ctrl/main.ini:
[mqtt]
Enabled=true
broker_addr=127.0.0.1
broker_port=1883
qos=0
keepalive=10

Next up: Windows support

New LINEDELAY and LINEDELAY:n @-codes
Another way to pace the terminal output of long display (e.g. ANSI) files. LINEDELAY enables a 1/10th of a second delay before the sending of all LF chars. LINEDELAY:n sets the line_delay duration explicitly to a value in 1/100ths of a second units. So LINEDELAY and LINEDELAY:10 are equivalent. LINEDELAY:0 turns line-pacing off. The original line pacing value is always restored after a printfile/putmsg operation.

New JS console.line_delay property (milliseconds) to control via JS. Setting this to a really high value would be bad. Some range enforcement should be added to this and many other console control values (TODO).

Now, if the BOOL argument value is FALSE, then the .ini file is opened read-only (and thus only read permissions are needed, resolving issue #455).

If the BOOL argument value is TRUE, create-if-not-exist is implied. There are no use cases where we would want to open an .ini file for writing only if it already existed.

Note: this centering logic does not know the expanded-size of the @-code, so use a fixed-length @-code (e.g. with padding) or use the 'C' @-code format modifier instead.

Fix issue #418

This is normally the first count value and even if we *just* output a progress() for a previous operation, we still want the first progress() call for the operation to display.

... regardless of the timing of the last progress report.
For cases where the progress output isn't erased once done doing the thing.

it just seems it's even worst than Deuce thought. :-)

Default the progress time interval to 500 milliseconds (twice a second).

Don't specify a count/call interval in the call-sites, since we really want to use time-based progress updates now only and the default probably will work fine everywhere.

To send less text over slow (e.g. 4800bps) modems. For Nelgin.

This makes the interval argument unnecessary I think.

Sometimes the progress meter (e.g. during file text searches) appears at a column offset > 0 and doesn't look good. Fix that.

I haven't played with this chat pager in *years*! The lowest tones were inaudible (raise the range from 0-800Hz to 400-1200Hz).
Increase the msgabort() tone from 1 to 10ms, sounds like those computerized voice recognition phone systems now.

Remove the redundant "<user> paged you to chat" notifications (and log message) when turning *off* the chat pager.

by adding a 'clear' argument to msgabort() that defaults to false. Pass true to check-and-clear.
checkline() is a NO-OP, so start eliminating "calls" to it.

This caused an issue for the soon to be committed P_INDENT support in putmsg().

Do nothing if online != ON_REMOTE. Eliminates some if(online == ON_REMOTE) clauses.

This won't impact Synchronet as it has a separate signal handling
thread, but we still need to behave properly for processes that
don't.  I'm also saying that ENOMEM does not indicate a disconnection,
though it may be better to pretend it was disconnected...

Caught by Coverity.

Hopefully not introducing any bugs in the process.

Hopefully not introducing any bugs in the process.

Ctrl-A codes that cause cursor movement or attribute changes or anything except toggling the console output will now be ignored when console output is off.

In preparation for node-spy applications that can support multiple terminal sizes/types (none exist yet). The file is updated whenever there is new/updated information about the client's terminal.

Exposed as JS method: console.term_updated().

I'm fed-up with MSVC assertions in ctype functions (e.g. isdigit, isprint, isspace, etc.) when called with out-of-range (e.g. negative) values.

This problem only affects MSVC debug builds, but if you run them (like I do), these things are like little time bombs that can drive you crazy (knocking your board out of service).

The new macros names are bit more descriptive as well.

No functional change with regard to the ANSI output state, just making the code easier to read.

Removed the conversion of `[ and \xFA[ to \x1b[ in putmsg(). This unexplained output translation has been supported since at least v2.xx and I have no recollection of exactly why it was added. If I recall correctly, some BBS software at some point in time sent ANSI-encoded messages into message networks by translating the ESC (\x1b) character in the ANSI sequences to either ` or \xFA in the process. This "feature" seems like it would still work, but it's completely undocumented and I have no idea why it was added (and seriously doubt anyone relies on this behavior), so I'm removing it. If anyone misses this feature, I'll happily add it back, but I'm skeptical that'll happen.