Ticket #426 - support posix schema for user and group sync
    
    https://fedorahosted.org/389/ticket/426
    Resolves: Ticket #426
    Bug Description: support posix schema for user and group sync
    Reviewed by: nhosoi, mreynolds (Thanks!)
    Branch: master
    Fix Description: This is a new winsync plugin.  By default it works with the
    posixaccount and posixgroup schema included with user and group entries in
    Windows 2003 R2 and later Active Directory.  There is a switch that can be
    set to use the older MSSFU schema.
    This is not entirely bi-directional - when you add new entries to DS, the
    posix attributes in those new user/group entries are not synced to AD -
    this is due to a limitation in the old winsync api v1.  Future work is
    planned to add that capability.
    This was copied from the upstream at
    https://github.com/cgrzemba/Posix-Winsync-Plugin-for-389-directory-server
    with permission from the author.
    Platforms tested: RHEL6 x86_64, Windows 2008 R2
    Flag Day: no
    Doc impact: no