Add a better error message to wb_common.c when unable to connect to a pipe

socket and add a comment to winbindd.c to explain the fancy calculation of
buffer offset.

source/nsswitch/wb_common.c

@@ -191,6 +191,8 @@ static int winbind_named_pipe_sock(const char *dir)
 	
 	if (connect(fd, (struct sockaddr *)&sunaddr, 
 		    sizeof(sunaddr)) == -1) {
+		DEBUG(10, ("error connecting to pipe socket: %s\n", 
+			strerror(errno)));
 		close(fd);
 		return -1;
 	}

source/nsswitch/winbindd.c

@@ -479,6 +479,13 @@ static void client_write(struct winbindd_cli_state *state)
 	int num_written;
 	
 	/* Write some data */
+	/*
+	 * The fancy calculation of data below allows us to handle the 
+	 * case where write (sys_write) does not write all the data we 
+	 * gave it. In that case, we will come back through here again
+	 * because of the loop above us, and we want to pick up where
+	 * we left off.
+	 */
 	
 	if (!state->write_extra_data) {