When setting a hostname for a group type using the wrong case, certain actions result in an infinite redirection loop.

For example: if the real name of a host is myhost.com and you set MyHost.com as a base host, then any request to http://myhost.com/... is automatically redirected to http://MyHost.com/, because $HTTP_HOST and $project->GetTypeBaseHost() are not the same.
Chances are however that browser or server will return a $HTTP_HOST
of myhost.com also for this new request, leading into an infinite loop of redirections. (FireFox signals a 'redirection limit exceeded' and bails out.)

Suggested correction: use a case independent compare between $HTTP_HOST and $project->GetTypeBaseHost() when checking whether a redirection is needed. This problem occurs in at least two different .php-files, so maybe the common code should be factored out?