TMXR fixes to support Virtual Null Modem Connections

sim_tmxr.c
sim_defs.h
	- Fixed parsing issues with NOTELNET option.
	- Fixed line closing logic to drop buffered contents when line errors occur before closing link.
	- Fixed logic to allow bidirectional line connections (i.e. listen=1234;connect=ip:2345 on both sides of a a virtual null modem).
2 files changed