tests: auto-set git-daemon port

A recent commit taught lib-httpd to always start apache on
the same port as the numbered tests. Let's do the same for
the git-daemon tests.

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

t/lib-git-daemon.sh

@@ -22,7 +22,7 @@ then
 	test_done
 fi
 
-LIB_GIT_DAEMON_PORT=${LIB_GIT_DAEMON_PORT-'8121'}
+LIB_GIT_DAEMON_PORT=${LIB_GIT_DAEMON_PORT-${this_test#t}}
 
 GIT_DAEMON_PID=
 GIT_DAEMON_DOCUMENT_ROOT_PATH="$PWD"/repo

t/t5570-git-daemon.sh

@@ -3,7 +3,6 @@
 test_description='test fetching over git protocol'
 . ./test-lib.sh
 
-LIB_GIT_DAEMON_PORT=${LIB_GIT_DAEMON_PORT-5570}
 . "$TEST_DIRECTORY"/lib-git-daemon.sh
 start_git_daemon