return 0;
        }
 
-       if (!prefixcmp(var, "http.")) {
+       if (starts_with(var, "http.")) {
                int i;
 
                for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
        struct rpc_service *svc = NULL;
        int i;
 
-       if (prefixcmp(name, "git-"))
+       if (!starts_with(name, "git-"))
                forbidden("Unsupported service: '%s'", name);
 
        for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
 
                        if (strcmp(method, c->method)) {
                                const char *proto = getenv("SERVER_PROTOCOL");
-                               if (proto && !strcmp(proto, "HTTP/1.1"))
+                               if (proto && !strcmp(proto, "HTTP/1.1")) {
                                        http_status(405, "Method Not Allowed");
-                               else
+                                       hdr_str("Allow", !strcmp(c->method, "GET") ?
+                                               "GET, HEAD" : c->method);
+                               } else
                                        http_status(400, "Bad Request");
                                hdr_nocache();
                                end_headers();