Merge branch 'jk/fix-proto-downgrade-to-v0'

Transports that do not support protocol v2 did not correctly fall
back to protocol v0 under certain conditions, which has been
corrected.

* jk/fix-proto-downgrade-to-v0:
  git_connect(): fix corner cases in downgrading v2 to v0

connect.c

@@ -1408,6 +1408,7 @@ static void fill_ssh_args(struct child_process *conn, const char *ssh_host,
  * the connection failed).
  */
 struct child_process *git_connect(int fd[2], const char *url,
+				  const char *name,
 				  const char *prog, int flags)
 {
 	char *hostandport, *path;
@@ -1417,10 +1418,11 @@ struct child_process *git_connect(int fd[2], const char *url,
 
 	/*
 	 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
-	 * to perform a push, then fallback to v0 since the client doesn't know
-	 * how to push yet using v2.
+	 * to perform any operation that doesn't involve upload-pack (i.e., a
+	 * fetch, ls-remote, etc), then fallback to v0 since we don't know how
+	 * to do anything else (like push or remote archive) via v2.
 	 */
-	if (version == protocol_v2 && !strcmp("git-receive-pack", prog))
+	if (version == protocol_v2 && strcmp("git-upload-pack", name))
 		version = protocol_v0;
 
 	/* Without this we cannot rely on waitpid() to tell