Revision 1138798

Merged revision 1138796 from trunk

    Simpler and safer db open/closing in view group servers

    This makes the opening and closing of databases in the view
    group server to be more friendly with the db reference counting
    system, avoiding more potential db file leaking after compaction,
    as we currently open a database in one process and use it on
    another process (view compactor, view updater).

    This significantly reduces the chances of failure when compacting
    very large views as discussed in COUCHDB-994.

    This relates to COUCHDB-926 and COUCHDB-994.