Ticket #48144 - Add /usr/sbin/status-dirsrv script to get the status of the directory server instance.
    
    Description:
    Analysis by vashirov@redhat.com:
      https://bugzilla.redhat.com/show_bug.cgi?id=1209128#c11
      The error comes from bash built-in `return`. bash version prior to
      4.3 didn't support negative numbers as argument for `return`.
      See for reference: http://wiki.bash-hackers.org/scripting/bashchanges
    
    As suggested in the comment, instead of -1, 255 should be returned in
    this error case:
      > 255 is returned if the instance does not exist.
    
    https://fedorahosted.org/389/ticket/48144
    
    Viktor's proposal is reviewed by nhosoi@redhat.com.