Use pid_runpath() in svc_find_by_pidfile(), used by pidfile plugin

The pidfile plugin just listens to changes in files in /run or /var/run,
so when trying to locate an svc_t from a file change we need to compare
using the proper prefix path.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

plugins/pidfile.c

@@ -69,9 +69,6 @@ static void pidfile_callback(void *arg, int fd, int events)
 		if (!svc)
 			continue;
 
-		/* TODO FIXME XXX WKZ check that pid is controlled by finit */
-
-		_d("%s: match %s", ev->name, svc->cmd);
 		mkcond(cond, sizeof(cond), svc->cmd);
 		if (ev->mask & (IN_CREATE | IN_ATTRIB | IN_MODIFY)) {
 			svc_started(svc);