memleak: make "_notleak" names less powerful.

They previously prevented any child from being detected as leaks, now
they just mark the tal allocation itself as not being a leak.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

common/configdir.c

@@ -122,6 +122,9 @@ static void parse_include(const char *filename, bool must_exist, bool early,
 			/* Only valid forms are "foo" and "foo=bar" */
 			all_args[i] = tal_fmt(all_args, "--%s", lines[i]);
 		}
+		/* This isn't a leak either */
+		if (all_args[i])
+			tal_set_name(all_args[i], TAL_LABEL(config_notleak, ""));
 	}
 
 	/*

common/memleak.c

@@ -77,10 +77,6 @@ static void children_into_htable(const void *exclude1, const void *exclude2,
 			if (strends(name, "struct io_plan *[]") && !tal_parent(i))
 				continue;
 
-			/* Other notleak internals. */
-			if (strends(name, "_notleak"))
-				continue;
-
 			/* Don't add tmpctx. */
 			if (streq(name, "tmpctx"))
 				continue;
@@ -244,6 +240,9 @@ static void call_memleak_helpers(struct htable *memtable, const tal_t *p)
 			else
 				pointer_referenced(memtable, p);
 			memleak_scan_region(memtable, p, tal_bytelen(p));
+		} else if (name && strends(name, "_notleak")) {
+			pointer_referenced(memtable, i);
+			call_memleak_helpers(memtable, i);
 		} else {
 			call_memleak_helpers(memtable, i);
 		}