Use explicit plugin names to prevent subtle macro processing bugs

plugins/resolvconf.c

@@ -51,7 +51,7 @@ static void setup(void *arg)
 }
 
 static plugin_t plugin = {
-	.name = __FILE__,
+	.name = "resolvconf",
 	.hook[HOOK_BASEFS_UP] = {
 		.cb  = setup
 	},