Add a over-fastidious pfree

It is mostly to indicate that this memory is no longer useful.

Signed-off-by: Daniel Farina <daniel@heroku.com>

Author: Daniel Farina

pg_logfebe.c

@@ -255,6 +255,7 @@ openSocket(int *dst, char *path)
 	 * awry.
 	 */
 	sendOrInval(&fd, startup.data, startup.len);
+	pfree(startup.data);
 	*dst = fd;
 	goto exit;