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

builtin/fetch-pack.c

@@ -213,8 +213,8 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 		int flags = args.verbose ? CONNECT_VERBOSE : 0;
 		if (args.diag_url)
 			flags |= CONNECT_DIAG_URL;
-		conn = git_connect(fd, dest, args.uploadpack,
-				   flags);
+		conn = git_connect(fd, dest, "git-upload-pack",
+				   args.uploadpack, flags);
 		if (!conn)
 			return args.diag_url ? 0 : 1;
 	}