Ticket #48122 nunc-stans FD leak
    
    https://fedorahosted.org/389/ticket/48122
    Reviewed by: mreynolds (Thanks!)
    Branch: master
    Fix Description: Called connection acquire from within a PR_ASSERT so
    the code was only called with DEBUG active.
    Platforms tested: Fedora 20, EL7
    Flag Day: no
    Doc impact: no