This macro has expanded to nothing for a while now and even before, the usage was misguided and unnecessary as explained in this video: https://www.youtube.com/watch?v=cjotPqQxxAY

There were 2 bug identified by issue #230:
- the "Fwd:" prefix being added to the message subject was being treated as a filename. I first thought to just remove this subject tag, but then thought it best to just ignore obviously invalid filenames in the subject in the first place.

- when forwarding files to a netmail address, the 'to' extension (user number) is 0, so the file will be in the data/file/####.out directory of the sender instead.

We have 4 places (at least) where the message subjects are parsed and only one of those places currently supports quoted filenames (e.g. with spaces in them) and some of the others (e.g. QWK) don't support multiple filenames at all. That should be fixed.

New JS User.stats properties:
- read_mail_waiting
- unread_mail_waiting
- spam_waiting

New @-codes:
- MAILR (read mail waiting)
- MAILU (unread mail waiting)

And the corresponding MAILR# and MAILU# codes (for non-current user's stats).

Addresses feature request #191.

The goal of this commit is that: only modules that either are part-of sbbs.dll/libsbbs.so or need to link with/use that library, will #include "sbbs.h" and thus be dependent on its subsequent includes (e.g. cryptlib.h, jsapi.h). This should mean extdeps.mk can be trimmed way down.

I also removed CVS keyword/comments and trimmed up the boilerplate copyright notice in modified and added source/header files in this commit.

There is no functional change in behavior in this comment.

normal (chronological) order of the returned mail indexes.

timeout) when opening the mail base for statistics purposes. This should
solve the problem of long delays during logon or sbbsctrl shutdown while
mail base maintenance is being performed.

removed.

conditions) - e.g. if a malloc or realloc failed, then some other allocated
memory would be leaked.

server log) using the new magic sbbs_t::lputs().
No more SSH errors if an SSH client's IP is blocked in ip.can (trying to send
the block msg).
New SSHConnectTimeout cfg value (in sbbs.ini [BBS]), defaults to 10 seconds.
Previously, fails SSH connections could block the bbs_thread for 30 seconds
(the Cryptlib default network connection timeout).
Overhauled a lot of the SSH-related log output to make it less chatty and more
meaningful.
getmail() is now more flexibility with regards to filtering by attribute flags
(not just SPAM).
Allow SPAM header attribute to be toggled with sysop 'C' command.

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.

since that is the only file we're reading in this function.
For some unkonwn reason, opening mail.sdt can sometimes take as long
as 2-3 seconds when the file is on a SMB/CIFS share. This could cause calls to
getmail() to stall noticeably (e.g. sbbsctrl, with the Statistics windows
visible) and logging into the terminal server or viewing user statistics. This
is a new problem, perhaps only with Vertrauen, but this optimization helps
to eliviate the most obvious performance problems triggered by it.
Better/safer string modification (e.g. use of SAFEPRINTF).

I've likely broken something though, so if you see weird behaviour with
extended ASCII, let me know please.

inserting (long) typedefs to prevent warnings, but in the case of the JS File()
class, actually supporting file lengths > 32-bit.

getlasgmsg() needs a uin32_t* as the second arg.
loadmail() needs an int32_t* as the second argument.
loadposts() needs an int32_t as the first argument.

loadmail() change which had a trickle-up effect to the higher level functions
that use loadmail().

smb_read() will now retry the read operation if the read fails with an errno of
DEADLOCK (occurs on Unix if a Win32 system has the bytes already locked).