Trac Ticket #276 - Multiple threads simultaneously working on
        connection's private buffer causes ns-slapd to abort
    
    https://fedorahosted.org/389/ticket/276
    
    Bug description: When a connection is to be released, the current
    code releases the connection object before making it readable,
    which leaves a small window for multiple threads accessing the
    same private buffer.
    
    Fix description: This patch moves the location of releasing the
    connection object after the connection is readable.