Rewrite Zmodem using state machine and avoiding static variables

Write janus, hydra?

Support BSD terminal control

Check available space when receiving

Check if there is mail before calling

Option to generate a gatewayed "reply-to" with a fixed domain

Lock if[un]pack against simultaneous execution

Execute ifunpack when ifcico finishes receiving

Check Xmodem bug

in openfile(), check for the presence of the file in inbound

Write device name in ifcico log

Change timeout checking in protocols

Option to fill .flo files with DOS format file names

Move space checking to a separate module

Make system independant file locking (working over NFS)

Make /var/spool/news and /tmp/ifmail compile-time configurable

Fix child waiting when packet has net and echomail
