Implement a Ctrl-C handler and modify the server to exit cleanly. #21
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Has the added benefit that logging off with 'x' actually disconnects
the Telnet connection.
One ctrl-c will trigger shutdown and hopefully stop the server. A second
ctrl-c will forcibly kill the server if something doesn't shut down
cleanly.
Calls the
finrou
routine on all modules. Session logoffs also callthe
huprou
routine, though we might want to see if it's more naturalto call
stsrou
instead.