mdocml: Fix two crashes that occur when walking very large (i.e.

mdocml: Fix two crashes that occur when walking very large (i.e.

[schwarze]

Log Message:
-----------
Fix two crashes that occur when walking very large (i.e. real-world) trees:
1) Avoid excessive, needless recursion, lest you overflow the stack;
2) Close all dir file descriptors, lest you run out of descriptors.
ok kristaps@

Modified Files:
--------------
    mdocml:
        mandocdb.c

Revision Data
-------------
Index: mandocdb.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/mandocdb.c,v
retrieving revision 1.6
retrieving revision 1.7
diff -Lmandocdb.c -Lmandocdb.c -u -p -r1.6 -r1.7
--- mandocdb.c
+++ mandocdb.c
@@ -1168,10 +1168,9 @@ pman_node(MAN_ARGS)
 		}
 	}
 
-	if (pman_node(hash, buf, dbuf, n->child))
-		return(1);
-	if (pman_node(hash, buf, dbuf, n->next))
-		return(1);
+	for (n = n->child; n; n = n->next)
+		if (pman_node(hash, buf, dbuf, n))
+			return(1);
 
 	return(0);
 }
@@ -1276,6 +1275,7 @@ ofile_dirbuild(const char *dir, int verb
 		}
 	}
 
+	closedir(d);
 	return(1);
 }
 
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