[Mediawiki-l] mediawiki rewrites url and includes port in link

[Alex F]

Hello,

I have the following setup:

haproxy load balancer which listens on port 80
   apache which listens on port 79
   nginx which listens on port 81

When I access www.mysite.com/wiki haproxy automatically delivers the request to nginx.
The problem is that the mediawiki scripts rewrite my URL from www.mysite.com/wiki/ to www.mysite.com:81/wiki/index.php?title=Main_Page
If I give the full link like so: www.mysite.com/wiki/index.php?title=Main_Page it does work without showing up the port.

I have tried to comment out the following line in index.php:
         $mediaWiki->initialize( $wgTitle, $wgArticle, $wgOut, $wgUser, $wgRequest );
and it no longer includes the port in the URL, but it also no longer displays content in pages.

What can I do?