Use ticket forwarding with TurboGears. mod_proxy forwards the principal

name and location of the keytab. In order for this keytab to be usable
 TurboGears and Apache will need to run as the same user. We will also need
 to listen only on localhost in TG.

ipa-python/ipaclient.py

@@ -47,6 +47,12 @@ class IPAClient:
         if self.local:
             self.transport.set_principal(princ)
 
+    def set_krbccache(self,krbccache):
+        """Set the file location of the Kerberos credentials cache to be used
+           for LDAP authentication"""
+        if self.local:
+            self.transport.set_krbccache(krbccache)
+
 # User support
     def get_user_by_uid(self,uid,sattrs=None):
         """Get a specific user by uid. If sattrs is set then only those