Imported from archive.

* mudpy.py (User.negotiate_telnet_options): Added support for RFC
1184 linemode and RFC 858 go ahead suppression. Automated end of
record/go ahead prompt terminator selection via Telnet option
negotiation. Added support for Telnet suboption negotiation. Fixed a
double-IAC escape matching error.
(User.send): Refactored away some spaghetti logic for better
readability.
(log): Added syslog support.