this is accomplished with smb_lockmsghdr() and unlockmsghdr() maintaining the
new smb_t.locked variable echoing the messagebase header 'locked' state.
Fixed a couple of error cases in smb_addmsghdr() where it would leave the
smb header in a locked state.
Increased the smblib version to 2.16.

Created 'locked' field in smb_t used internally in smblib.c so that
smb_addmsghdr() will not try to re-lock an already locked SMB header,
eliminates a potential hole between calling smb_unlockmsghdr and smb_addmsghdr.

strings into port numbers (rather than trying to look-up by service name).

Created new listen() method, puts socket in 'listening' state,
accepts optional 'backlog' argument (defaults to 1).
Created new accept() method, accepts an inbound TCP connection,
returns a newly created socket object. This version will adversely effect the
open socket counter (need accept_socket in main.cpp).

when the socket is created (read-only).
Fixed bug in bind() if port number specified (needed byte-order fix).
Port arguments in bind() and connect() can now be specified as a server name
(e.g. "telnet", "http", "finger", etc).

(defaults to false). If a file is opened as 'shareable', then simultaneous
opens will be allowed (no file locking), otherwise, the file is locked
according the the open 'mode'.

(instead of strings).

arguments. Offset defaults 0, and length defaults to the file length - offset.

seteuid failed.

connect() call is no longer needed for UDP sockets.

(hopefully fixing problem with re-binding UDP sockets).

in recv() calls.

(same as bbs methods by the same name but can be called from other servers).

outside the sbbs_t class).

data, ip_address, and port (for Deuce's UDP experiment).

occurance of any char in given set.

termination of bbs_thread - was freeing too many user subs/dirs if they were
added in SCFG and the confg files were re-loaded.

(64) to 48.