awesome-client.c manipulates the string returned from getenv("DISPLAY"),
removing anything after the first dot ('.'). awesome.c however has no
such thing, leading to awesome listening on a '...0.0' socket. Anyway,
this seems like something that should be in get_client_addr as opposed
to hardwired in awesome-client.c or awesome.c. The attached patch moves
it into awesome-client-common.c:get_client_addr() and teaches
awesome-client.c of the change.
