This should fix the 'undefined' crashes involving Selectable_Sockets_Map.

* Fix for 'undefined' being displayed in server info for QWK-connecting servers

Changed all the malloc/realloc/free stuff to std C (no legacy macros).

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).

offset of the original message, which if later deleted (due to the yes/no ques)
would corrupt the source message base.
Updated brace style.

for aliases.

No duplicate IPs in sbbsimsg.lst.

is prematurely aborted (due to other error).
Bugfix: message packing now unlocks message base before re-opening to write new
header status.

databases (the larger the base, the lower the frequency), since scanning a large
user database to count the number of active users can take a full second or
more, which interferes with the user response time in the GUI.