[Lcdproc] [Patch] Ignore SIGPIPE on the server

[Peter McCurdy]

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For the past few days I've been wondering why LCDd sometimes quits
when I close my client.  Today I discovered it's because the server
doesn't ignore SIGPIPE.  If the server ever attempts to write to a
socket where the client has silently disappeared (which can happen
even with well-behaved clients), it'll receive SIGPIPE, and the
default action for SIGPIPE is to terminate the process.  This default
makes sense for standard Unix pipeline commands, but is obviously a
terrible setting for a server.

This patch gets the server to ignore SIGPIPE, since it already
properly handles the error from writing to the socket.  After applying
this patch, if you run "killall -PIPE LCDd", the server will continue
to run, whereas before it would exit.  More to the point, if you run
"killall -KILL lcdproc", the server will always continue to run.

I threw in a fix for the Windows port as well, but I haven't tested
it.  It looks pretty straightforward though.

Thanks.

Peter.

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