initialize sockaddrdscp to prevent spurious output from 'named-checkconf -p'

CHANGES

+5405.	[bug]		'named-checkconf -p' could include spurious text
+			in server-addresses statements due to an uninitialized
+			DSCP value. [GL #1812]
+
 5404.	[bug]		'named-checkconf -z' could incorrectly indicate
 			success if errors were found in one view but not in a
 			subsequent one. [GL #1807]

bin/tests/system/checkconf/good.conf

@@ -120,6 +120,12 @@ view "second" {
 		};
 		zone-statistics no;
 	};
+	zone "example3" {
+		type static-stub;
+		server-addresses {
+			1.2.3.4;
+		};
+	};
 	zone "clone" {
 		in-view "first";
 	};

bin/tests/system/checkconf/good.zonelist

@@ -2,6 +2,7 @@ example1 IN first master
 clone IN first master
 example1 IN second master
 example2 IN second static-stub
+example3 IN second static-stub
 clone IN second in-view first
 . IN second redirect
 clone IN third in-view first

bin/tests/system/checkconf/tests.sh

@@ -380,7 +380,7 @@ if [ $ret != 0 ]; then echo_i "failed"; ret=1; fi
 status=`expr $status + $ret`
 
 n=`expr $n + 1`
-echo_i "check that named-checkconf -l print out the zone list ($n)"
+echo_i "check that named-checkconf -l prints out the zone list ($n)"
 ret=0
 $CHECKCONF -l good.conf |
 grep -v "is not implemented" |

lib/isccfg/parser.c

@@ -3239,6 +3239,7 @@ parse_netaddr(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) {
 	CHECK(cfg_create_obj(pctx, type, &obj));
 	CHECK(cfg_parse_rawaddr(pctx, flags, &netaddr));
 	isc_sockaddr_fromnetaddr(&obj->value.sockaddr, &netaddr, 0);
+	obj->value.sockaddrdscp.dscp = -1;
 	*ret = obj;
 	return (ISC_R_SUCCESS);
 cleanup: