corresponding *_net_addr field is present (not NULL).

Allow an added or modified message header to have to/from/reply-to "net type" values of NET_NONE. This is a weird scenario, but it is technically possible (e.g. for nntpservice.js) to save a message with a to/from/treply-to "net address" header, but an associated net-type of NET_NONE. By saving the net-type NET_NONE, when saving a modified header, if the associated net address header field value cannot be parsed into a valid network address, there won't be any error reported, e.g.
Error -110 adding SENDERNETADDR field to message header

warning: iteration 9 invokes undefined behavior

Automatically detect the character set of QWK-imported messages (that don't already have a FidoNet "CHRS" header) and create/set the FIDOCHARS header field accordingly (UTF-8, ASCII, or CP437). This should resolve the issue I observed of QWK-posted messages on FidoNet with the wrong CHRS header value (i.e. CP437, when the message body in fact contained UTF-8).

Some echolists (e.g. linuxnet.na) use '%' for comments (rather than ';') so just ignore any lines in imported echolists that begin with a non-alpha-numeric character.

*always* set the KILLSENT attribute flag on email/netmail received for relay via SMTP (regardless of the Internet/Fido netmail setting in SCFG).
The sender should already have a copy (e.g. in their outbox), if they want to keep it.

MSG_SENT is in the netattr field, not the attr field. Double-oops. Thanks Dan_C and Nelgin for bringing to my attention.

- argv[0] does not always contain the full path to the executable, so that is
  not a good way to locate the exec directory.
- since we already need to know the ctrl dir and that is the normal place to
  put config files, that's where it shall be.
- jsdoor builds don't get a .ini file - I don't think they need it (?)

When inkey() receives an ANSI escape sequence it doesn't need to consume, put the consumed characters into the keyboard buffer *ahead* of whatever else is in the keyboard buffer already. Uses new ungetkey() insert mode option.

The temporary pause toggle command (Ctrl-O) is now stored in the sbbs_t::console member so re-loads of the user-record (due to external changes) won't seemingly-randomly toggle off the user's temp toggle.

Oops. This is an important field too (set to 0x0020).
Reported by Ragnarok, thanks!

Assume the characters in the ungetkey-buffer are ASCII. This fixes the problem with getstr(..., K_AUTODEL) and PETSCII terminals, reversing the case (capitalization) of the first character typed.

After displaying a native PETSCII (.seq) file, reset the character set to Upper/Lower for compatibility with the rest of the BBS (some PETSCII Art files change the character set to Upper/Graphics).

When a user sends an ANSI escape sequence (like say, an arrow key), don't set the persistent ANSI flag in their user record. Setting the flag in the auto-terminal detection value should be enough.

argument has type 'int'

So a (ushort&ushort) == int? That makes no sense.When in doubt, typecast!

Resolve warning: comparison of array 'client->host' not equal to a null pointer is always true in Clang

part of the file, assuming lines are not >8K (on average).

Don't use P_OPENCLOSE printfile() mode for any files > 2MB in size.

Support the continue-on-error option (-C) with the -R (repair) command.

The 'U' modifier for @-codes implies left-alignment, but does not truncate the expanded value by default (only when a width is explicitly expressed).

New option to control whether the "KILLSENT" attribute is set on locally created Internet email messages. Defaults to "No".
At the request of Mark Lewis.

Set the KILLSENT network attribute for created Internet email messages when enabled in SCFG->Networks->Internet (new option).
Do the same for FidoNet NetMail messages routed via SMTP.
Only auto-delete sent Internet mail messges when either the KILLSENT
network attribute flag is set or there was no SENDEREXT (from_ext) on the sent message.

Set the "LOCAL" network-attribute on locally-created Internet email messages (no use currently, but seems prudent).
Set the KILLSENT network attribute for created Internet email messages when enabled in SCFG->Networks->Internet (new option).

Always delete exported netmail if there's no SENDEREXT (from_ext) as this could result in orphaned sent-mail otherwise.

Make sure the chat window is in the same place as the waiting window
Fix chat window not in taskbar issue

just immediately return 0.

Eventually, would love to get this entire project divorced from sbbs.h, but
that's a rabbit hole I don't want to go down right now.

ctrl/*.cpp includes this file and does not use/include libjs.

FIDOCHARSET header field appropriately.
Detect UTF-8 in any of the viewable header fields and set the appropriate aux
attribute flag.