Use a ? after the $request_uri to perform a valid Redirect while cloning.

fixes #6203

before:

❯ curl -I http://gitlab/namespace/repo.git/info/refs?service=git-upload-pack
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Sat, 26 Jul 2014 18:20:27 GMT
Content-Type: text/html
Content-Length: 178
Connection: keep-alive
Location: https://gitlab/namespace/repo.git/info/refs?service=git-upload-pack?service=git-upload-pack

after:

❯ curl -I http://gitlab/namespace/repo.git/info/refs\?service=git-upload-pack
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Sat, 26 Jul 2014 18:23:54 GMT
Content-Type: text/html
Content-Length: 178
Connection: keep-alive
Location: https://gitlab/namespace/repo.git/info/refs?service=git-upload-pack

[ci skip]

lib/support/nginx/gitlab-ssl

@@ -54,7 +54,7 @@ server {
   server_name YOUR_SERVER_FQDN; ## Replace this with something like gitlab.example.com
   server_tokens off; ## Don't show the nginx version number, a security best practice
   root /nowhere; ## root doesn't have to be a valid path since we are redirecting
-  rewrite ^ https://$server_name$request_uri permanent;
+  rewrite ^ https://$server_name$request_uri? permanent;
 }
 
 server {