s3-lib: If we create a pipe socket, don't start to listen.

s3-lib: If we create a pipe socket, don't start to listen.

The create_pipe_sock() function should only create the socket as the
name states and not start to listen on it too. We should start to listen
on in the individual places as we need different backlog values.

Autobuild-User: Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date: Mon Aug 29 13:21:43 CEST 2011 on sn-devel-104