Reload list of repositories on wsgi

[Igor Kostenko]

> I had a problem with mod_python at some point - turned out the binary
> distrib I used had an unresolved function in the mod_python dll !
> Possibly your problem is in apache rather then in hg. 
> Try disabling mod_python for a start.

Problem exists without mod_python. And problem was introduced by mercurial - 
0.9.5 works fine in the same configuration.