Don't pass RFPROC to kproc_create(), it is redundant.

Reviewed by:	tuexen, kib
MFC after:	1 week
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D29206

sys/netinet/sctp_bsd_addr.c

@@ -108,7 +108,7 @@ sctp_startup_iterator(void)
 	kproc_create(sctp_iterator_thread,
 	    (void *)NULL,
 	    &sctp_it_ctl.thread_proc,
-	    RFPROC,
+	    0,
 	    SCTP_KTHREAD_PAGES,
 	    SCTP_KTRHEAD_NAME);
 }

sys/netinet/sctp_pcb.c

@@ -5678,7 +5678,7 @@ sctp_startup_mcore_threads(void)
 		(void)kproc_create(sctp_mcore_thread,
 		    (void *)&sctp_mcore_workers[cpu],
 		    &sctp_mcore_workers[cpu].thread_proc,
-		    RFPROC,
+		    0,
 		    SCTP_KTHREAD_PAGES,
 		    SCTP_MCORE_NAME);
 	}