X Object manager policy revisions to x_contexts.
    
    X Object manager policy revisions to x_contexts.
    
    Many of the specific event, extension, and property types have been
    removed for the time being.  Polyinstantiation allows selections and
    properties to be separated in a different way, and new X server support
    for labeling individual extension requests (as opposed to entire extensions)
    should make the extension querying problem easier to solve in the future.
    
    Signed-off-by: Eamon Walsh <ewalsh@tycho.nsa.gov>
    Signed-off-by: Chris PeBenito <cpebenito@tresys.com>