Some low-priority bugfixes & enhancements.
    
    - fix rare race condition in request.c
    - print "the working directory is not writable" as debug message
    - re-add configtest target to initscript
    - initscript: sybsys name is always named, not named-sdb
    - nsupdate returned zero when target zone didn't exist (#700097)
    - nsupdate could have failed if server has multiple IPs and the first
      was unreachable (#714049)
    
    Signed-off-by: Adam Tkac <atkac@redhat.com>