The version in xfs in XFree86-3.3.3.1-49 does not appear to
listen for incoming connections.
Copying xfs from a similar system running
XFree86-3.3.3.1-22  and running it allows telnet connections
to be made to port 7100 and a LISTEN entry shows up in
netstat -a

However, if  xfs from -49 is used then although an strace
reveals it to be waiting at a select, netstat -a makes no
mention of a service listening on 7100 and telnet 127.0.0.1
7100 yields connnection refused. The configuration file used
is the same in both cases.