New version 1.12

* Tue Nov 8 2011 : Version 1.12
 - Add new tunable : AllowClientDBAttach that can be used to stop
   client db access during maintenance operations
 - Updated logging for interfaces that are missing or dont exist but are
   configured to be used.
 - Add timeout argument to ctdb_cmdline_client
 - PDMA support
 - Initial support for 'readonly' delegations for ctdb databases
   This will when finished greatly improve performance for contended hot
   records that are used for just read-access.
 - New 'ctdb cattdb' command
 - Massive updates to tests and eventscripts
 - LCP2 ip allocation algorithm
 - Record Fetch collapse. Collapse multiple fetch-lock requests from cients
   to a single network fetch and defer other concurrent requests until the
   initial fetch completes, and then service the deferred calls locally.
   This will greatly improve performance for contended hot records
   where clients request write-locks.

(This used to be ctdb commit bda24b7f313289404b68ce8b9177fbd6b6a05dd7)

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