(plus the NULL terminator). No functional change.

Eliminated non-standard fcloseall() call (should build on *nix now).

semwrap and are currently unused and untested (but *should* work)

set to an arbitrary value... make sem_reset() use this function.

Log and count file read errors.
More beautification.

utilization). We really need a cross-platform manually resetable boolean
semaphore (like a Windows "event").

numbers for wrapped buffers (off by one). Whoops.
Created RingBuf.empty_sem for tasks that need to wait for a buffer to be empty.

module).

recipient/to comparison, stop comparing. This bug caused non-passthru mailprocs
to not work.

Increased highwater mark to 1100 (x/ymodem packets are slightly larger than 1k)
this may be the cause of occasional "short packets" reported by receiver.

Using multiple threads to increase throughput (avg packet size) and reduce CPU
utilization. Currently works with Xmodem and Ymodem(-G).
Still no comparison to FTP, but reaching 100,000+cps over 100Mbit LAN.
Zmodem needs work now.