r3013: added support for unix domain sockets in the generic socket library. I

will shortly be using this for a rewrite of the intra-smbd messaging
library, which is needed to get lock timeouts working properly (and
share modes, oplocks etc)

source/lib/socket/socket.c

@@ -240,5 +240,9 @@ const struct socket_ops *socket_getops_byname(const char *name, enum socket_type
 		return socket_ipv4_ops();
 	}
 
+	if (strequal("unix", name)) {
+		return socket_ipv4_ops();
+	}
+
 	return NULL;
 }