bind/dig are not happy with uncompressed
names in Tsrv results.  in fact they refuse to
process the results.

the rfcs are a maze of conflicting requirements.
give up and just make bind happy.

Reference: /n/sources/patch/maybe/dnssrv
Date: Thu Sep 17 02:22:54 CES 2009
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/ndb/convDNS2M.c	Thu Sep 17 02:21:20 2009
+++ /sys/src/cmd/ndb/convDNS2M.c	Thu Sep 17 02:21:18 2009
@@ -260,7 +260,11 @@
 		USHORT(rp->srv->pri);
 		USHORT(rp->srv->weight);
 		USHORT(rp->port);
-		STRING(rp->host->name);	/* rfc2782 sez no name compression */
+		/*
+		 * rfc2782 sez no name compression, but
+		 * but bind (dig) disagree.  we'll go with bind.
+		 */
+		NAME(rp->host->name);
 		break;
 	case Ttxt:
 		for(t = rp->txt; t != nil; t = t->next)