[svn] * src/client.c,src/protocol.c,src/util.h,src/util.c: Common up repeated signal handler setting code into Utl_installSignalHandler. * src/client.c: Ensure Client_retrieveArt always exits with the global lock held. Previously it would be held on error, not held if OK.

To build an RPM for version m.n release r, set Version to m.n and Release to r.
Then rename the noffle directory to noffle-m.n, and make a compressed tar
noffle-m.n.tar.gz.

Run 'rpm -ta noffle-m.n.tar.gz' to generate binary and source RPMs.