Propagate -u/--upload-pack option of "git clone" to transport.

The -u option to override the remote system's path to git-upload-pack was
being ignored by "git clone"; caused by a missing call to
transport_set_option to set TRANS_OPT_UPLOADPACK. Presumably this crept in
when git-clone was converted from shell to C.

Signed-off-by: Steve Haslam <shaslam@lastminute.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-clone.c

@@ -473,6 +473,10 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		if (option_quiet)
 			transport->verbose = -1;
 
+		if (option_upload_pack)
+			transport_set_option(transport, TRANS_OPT_UPLOADPACK,
+					     option_upload_pack);
+
 		refs = transport_get_remote_refs(transport);
 		transport_fetch_refs(transport, refs);
 	}

t/t5602-clone-remote-exec.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+test_description=clone
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	echo "#!/bin/sh" > not_ssh
+	echo "echo \"\$*\" > not_ssh_output" >> not_ssh
+	echo "exit 1" >> not_ssh
+	chmod +x not_ssh
+'
+
+test_expect_success 'clone calls git-upload-pack unqualified with no -u option' '
+	GIT_SSH=./not_ssh git clone localhost:/path/to/repo junk
+	echo "localhost git-upload-pack '\''/path/to/repo'\''" >expected
+	test_cmp expected not_ssh_output
+'
+
+test_expect_success 'clone calls specified git-upload-pack with -u option' '
+	GIT_SSH=./not_ssh git clone -u /something/bin/git-upload-pack localhost:/path/to/repo junk
+	echo "localhost /something/bin/git-upload-pack '\''/path/to/repo'\''" >expected
+	test_cmp expected not_ssh_output
+'
+
+test_done