TODO listing, comment fix

git-svn-id: file:///svn/unbound/trunk@264 be551aaa-1e26-0410-a405-d3ace91eadb9

doc/TODO

@@ -11,4 +11,5 @@ o possible optimization, so that precious id number resource is not depleted
   by parsing of messages. Delay malloc, as above, or try to reverse release
   special id numbers, and if you release the next_id number for the thread
   it reuses that id number.
-o calculate rdata size during parse step, instead of delay until copy.
+o use rbtree to compress domain names in messages, sorted AXFRs of 16Kb
+  and so on. This may be faster for that case.

util/data/msgreply.c

@@ -612,7 +612,7 @@ compress_tree_insert(struct compress_tree_node** tree, uint8_t* dname,
 	while(p) {
 		c = dname_lab_cmp(dname, labs, p->dname, p->labs, &m);
 		log_assert(c != 0); /* may not already be in tree */
-		if(c==0) return p;
+		if(c==0) return p; /* insert only once */
 		if(c<0)	{
 			prev = &p->left;
 			p = p->left;