git-svn: fix cloning of HTTP URLs with '+' in their path

With this, git svn clone -s http://svn.gnome.org/svn/gtk+
is successful.

Also modified the funky rename test for this, which _does_
include escaped '+' signs for HTTP URLs.  SVN seems to accept
either "+" or "%2B" in filenames and directories (just not the
main URL), so I'll leave it alone for now.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/lib-git-svn.sh b/t/lib-git-svn.sh
index 9decd2e..d8f3355 100644
--- a/t/lib-git-svn.sh
+++ b/t/lib-git-svn.sh
@@ -73,11 +73,16 @@
 done
 
 start_httpd () {
+	repo_base_path="$1"
 	if test -z "$SVN_HTTPD_PORT"
 	then
 		echo >&2 'SVN_HTTPD_PORT is not defined!'
 		return
 	fi
+	if test -z "$repo_base_path"
+	then
+		repo_base_path=svn
+	fi
 
 	mkdir "$GIT_DIR"/logs
 
@@ -90,13 +95,13 @@
 Listen 127.0.0.1:$SVN_HTTPD_PORT
 LoadModule dav_module $SVN_HTTPD_MODULE_PATH/mod_dav.so
 LoadModule dav_svn_module $SVN_HTTPD_MODULE_PATH/mod_dav_svn.so
-<Location /svn>
+<Location /$repo_base_path>
 	DAV svn
 	SVNPath $rawsvnrepo
 </Location>
 EOF
 	"$SVN_HTTPD_PATH" -f "$GIT_DIR"/httpd.conf -k start
-	svnrepo=http://127.0.0.1:$SVN_HTTPD_PORT/svn
+	svnrepo="http://127.0.0.1:$SVN_HTTPD_PORT/$repo_base_path"
 }
 
 stop_httpd () {