Squashed commit of the following:

commit f13fd991d99207f321c20642ef8c4d28c29c6703
Author: Dmitry Litvintsev <litvinse@fnal.gov>
Date:   Mon Jun 10 18:57:03 2013 -0500

    respect session read-only in SRM
    module: summary line

    what happened

    Ticket: 7842
    Patch: http://rb.dcache.org/r/5633/
    Acked-by: Al Rossi
    Target: trunk
    Require-book: no
    Require-notes: yes
    Bug: http://rt.dcache.org/Ticket/Display.html?id=7842
    Signed-off-by: Dmitry Litvintsev
    Request: 2.6

    RELEASE NOTES:
    SRM respects read-only session qualifier (as specified in storage-authzb or dcache.kpwd). That is
    if login record contains "read-only" qualifier SRM will refuse performing namespace modification
    functions with SRM_AUTHORIZATION_FAILURE error code