pf: print 'once' rule expire time

Obtained from:	OpenBSD, sashan <sashan@openbsd.org>, 8cf23eed7f
Sponsored by:	Rubicon Communications, LLC ("Netgate")

lib/libpfctl/libpfctl.c

@@ -1699,6 +1699,7 @@ static struct snl_attr_parser ap_getrule[] = {
 	{ .type = PF_RT_MAX_PKT_SIZE, .off =_OUT(r.max_pkt_size), .cb = snl_attr_get_uint16 },
 	{ .type = PF_RT_TYPE_2, .off = _OUT(r.type), .cb = snl_attr_get_uint16 },
 	{ .type = PF_RT_CODE_2, .off = _OUT(r.code), .cb = snl_attr_get_uint16 },
+	{ .type = PF_RT_EXPTIME, .off = _OUT(r.exptime), .cb = snl_attr_get_uint64 },
 };
 #undef _OUT
 SNL_DECLARE_PARSER(getrule_parser, struct genlmsghdr, snl_f_p_empty, ap_getrule);

lib/libpfctl/libpfctl.h

@@ -285,6 +285,8 @@ struct pfctl_rule {
 		struct pf_addr		addr;
 		uint16_t		port;
 	}			divert;
+
+	time_t			exptime;
 };
 
 TAILQ_HEAD(pfctl_rulequeue, pfctl_rule);