logger: temporarily disable Capsicum when a host is provided

We don't have a way to send a UDP package.

PR:		245314
Reported by:	dch
Discussed with:	emaste

usr.bin/logger/logger.c

@@ -181,8 +181,10 @@ main(int argc, char *argv[])
 		err(1, "Unable to contact Casper");
 	caph_cache_catpages();
 	caph_cache_tzdata();
+	if (nsock == 0) {
 		if (caph_enter() < 0)
 			err(1, "Unable to enter capability mode");
+	}
 	capsyslog = cap_service_open(capcas, "system.syslog");
 	if (capsyslog == NULL)
 		err(1, "Unable to open system.syslog service");