Use a correct pexp and unbreak stop/reload. The old and wrong pexp

in /var/run/rc.d/identd has to be manually removed.
Reported by Adam Jeanguenat (avj at voyager dot 6v6 dot org).
ok dcoppa@ lteo@

src/etc/rc.d/identd

@@ -1,12 +1,13 @@
 #!/bin/sh
 #
-# $OpenBSD: identd,v 1.6 2013/08/08 15:41:28 ajacoutot Exp $
+# $OpenBSD: identd,v 1.7 2013/12/11 16:25:48 jca Exp $
 
 daemon="/usr/sbin/identd"
 daemon_flags="-e"
 
 . /etc/rc.d/rc.subr
 
+pexp="identd: (listen|resolver)"
 rc_reload=NO
 
 rc_cmd $1