In a heavy load environment, sometimes the failover service record
would be updated and free the URI value. We need to guarantee that
this URI string remains valid throughout the entire request.
https://fedorahosted.org/sssd/ticket/1139
Patch 0001 adds and corrects some useful debugging information I used to
track down this issue.
Patch 0002 implements the copying to guarantee the integrity of the
string until the request completes.