Ticket 50669 - remove nunc-stans
    
    Bug Description: We have been attempting to modernise our
    connection code for a long time - one attempt was nunc-stans.
    However after a series of attempts to integrate it, and multiple
    failures we discussed this in the listed email thread and decided
    to remove this.
    
    https://lists.fedoraproject.org/archives/list/389-devel@lists.fedoraproject.org/thread/3JRQQRIPOVDLLRD2QMF2PWNHJGZFUDCC/
    
    Fix Description: rm -r src/nunc-stans
    
    https://pagure.io/389-ds-base/issue/50669
    
    Author: William Brown <william@blackhats.net.au>
    
    Review by: mreynolds (Thanks!)