receive-pack: turn on connectivity progress

When we receive a large push, the server side of the
connection may spend a lot of time (30s or more for a full
push of linux.git) walking the object graph without
producing any output. Let's give the user some indication
that we're actually working.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/receive-pack.c

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index d309109..7db1639 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1342,6 +1342,7 @@ static void execute_commands(struct command *commands,
 	data.cmds = commands;
 	data.si = si;
 	opt.err_fd = err_fd;
+	opt.progress = err_fd && !quiet;
 	if (check_connected(iterate_receive_command_list, &data, &opt))
 		set_connectivity_errors(commands, si);