[xmonad] Issue 427 in xmonad: xmonad should recompile configuration on SIGHUP

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Comment #2 on issue 427 by allber... at gmail.com: xmonad should recompile  
configuration on SIGHUP
http://code.google.com/p/xmonad/issues/detail?id=427

That's actually a convention for servers, which usually have no other way  
to get notified of need to reload.  Since I can think of at least two ways  
to ask xmonad to reload its configuration, it isn't really needed here.