+Incorporate patch by Morten Bogeskov which allows a Unix file socket
+server to specify uid/gid/mask for socket using the format
+ unix:[user=uid,][group=gid,][umask=mask,]file=path
+If file= is omitted the existing format is assumed, e.g.
+ unix:path
+in which case the mask is 0666 (rw for everybody).
+