The sbbs_t::wordwrap[] buffer was 81 characters (80 printable characters, plus
NUL terminator) and sbbs_t.getstr(), when used with the K_WRAP mode flag could
potentially write more than 81 characters to this buffer (e.g. when using a
wider than 80 column terminal and writing a message with the internal line
editor which calls sbbs_t::getstr(... K_WRAP)) - would corrupt sbbs_t members
after wordwrap[], which included pointers that would be freed in the sbbs_t
destructor (~sbbs_t) and subsequently page/segfault as seen in issue #545.

This change increases the wordwrap buffer to likely twice the same needed
(maximum columns + NUL terminator) and adds wordwrap bounds checking to
sbbs_t::getstr().

There were comments indicating crash sightings in the sbsb_t destructor going
back to 2002, so this commit removes those comments.

Thanks to Nelgin for providing the gdb dump details ('print *this') that was
the clue needed to reach the root-cause determination.

This fixes issue #545.

Fixes issue #544

Need to use this for creating nightly sbbs_src.tgz file

Also suppress the diff errors when the git_*.h files don't exist

Removed backup_level option from save_cfg()

This seems kind of circular doesn't it? Anyway, add a new SCFG->System->
Advanced->Configuration Backup option to set the number of config (.ini)
file backups to keep (default is 5).

Eliminate the scfg -b option (used to manually over-ride the default
backup level of 5).

Fix for issue #542

When multiple servers are recycling at the same time, (e.g. due to saved
change in SCFG) they'd each call sbbs_read_ini() with a shared global_startup
struct, which in turn calls sbbs_free_ini(), which would free all the
allocated network interface lists (including the global_startup one) using
iniFreeStringList (just a wrapper for strListFree), but iniFreeStringList()
does NOT modify (NULLify) the freed-pointer, so your second or third server
that called sbbs_read_ini(), with the shared MainForm->global structure, would
*again* free the same global interface list. This bug actually has always
existed because get_ini_globals() freed the global interface list in the same
way, except it *immediately* re-allocated a new one by calling
iniGetStringList(), so the time window (opportunity) for this race condition
to occur was much smaller. Truly, SBBSCTRL should use a mutex or other
mechanism to protect the shared global_startup struct, but this is a first
step to a full fix: sbbs_free_ini() should (and now does) nullify the freed
network interface pointers by using strListFree() directly. I haven't been
able to reproduce the crash upon recycle in SBBSCTRL after making this change.

warning: format not a string literal and no format arguments

Weird this warning is happening for me with GCC 12.2 (debug or release build)

smtp_netmail_addr() - not currently used anywhere else, but may be someday.
load/mailutil.js's fidoaddr_to_emailaddr() has this same logic (for FTN addrs
at least and is now used by nntpservice.js).

Also, always pass a buffer to smb_faddrtoa() from the mail server since it's
multi-threaded and its unsafe to pass NULL (using a static local buffer).

smb_faddrtoa() uses a static local buffer if passed NULL and we shouldn't be
doing that from multi-threaded callers.

Use the terminal server sem file check interval instead of node_sem_check
(it was only used in the event thread) and node_stat_check was only used in
the control panel, so just support a registry over-ride, but default to 5 sec.

These settings were artifacts from SBBS v2 (WFC mode), and not really relevant
or in the proper configuration place.

CID 451182

This is an easily overlooked setting, let's make it easier

Modem result codes. Oh, the memories...

... rather than just return false.

This will make debugging this type of issue much easier in the future.
sendmail.js was allowing empty recipient_list array arguments and the MsgBase
.status was 0 and .error just an emtpy string - unhelpful.

(like we do for Message Groups and File Libraries already)

Move the Mail Server->SendMail* settings to their own sub-menu.

Added popups while reading sbbs.ini

Fixed reversal of logic for FTP Server->Sysop File System Access option

And display an error message upon failure.

Still needs online help text.

This allows the [Global] section to be applied to each server section correctly

Before this change, changing BindRetry in the global settings would result in
the original global BindRetry value being added to each server/section of
the sbbs.ini file.

Remove values, not keys, when setting a key with a global default.

Use UInt16 functions for getting/setting TCP ports (this fixes an issue with
the FTP PasvHigh port being set to -1 (instead of 65535).

Use iniGetUInteger instead of iniGetShortInt for most other key values.

First sbbs.ini save support in SCFG, still experimental.

Allows SCFG to more easily display the most relevant .ini file using the
UIFC timedisplay() callback.