Description of problem:

I am trying to access the XMLRPC Server of FreeIPA via Rubies XMLRPC::Client.
This doesn't work, because the service itself sends out Content-Type:
text/plain

which is wrong in terms of XMLRPC. Ruby itself has a strict sanity check in its
XMLRPC Client, and throws an Exception when the returned Content-Type is not
text/xml

Version-Release number of selected component (if applicable):
3.0.0-26.el6

How reproducible:

One just needs to call IPA in Negotiate mode:

$ ipa --delegate -vv user-show admin