Mfp: r296260

The tcp_inpcb (pcbinfo) zone should be safe to destroy.

PR:		164763
Reviewed by:	gnn
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D5732

sys/netinet/tcp_subr.c

@@ -654,8 +654,7 @@ tcp_init(void)
 		    hashsize);
 	}
 	in_pcbinfo_init(&V_tcbinfo, "tcp", &V_tcb, hashsize, hashsize,
-	    "tcp_inpcb", tcp_inpcb_init, NULL, UMA_ZONE_NOFREE,
-	    IPI_HASHFIELDS_4TUPLE);
+	    "tcp_inpcb", tcp_inpcb_init, NULL, 0, IPI_HASHFIELDS_4TUPLE);
 
 	/*
 	 * These have to be type stable for the benefit of the timers.