Merged revisions 312211 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r312211 | alecdavis | 2011-04-01 22:03:11 +1300 (Fri, 01 Apr 2011) | 36 lines
  
  Merged revisions 312210 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
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    r312210 | alecdavis | 2011-04-01 21:47:29 +1300 (Fri, 01 Apr 2011) | 29 lines
    
    Merged revisions 312174 via svnmerge from 
    https://origsvn.digium.com/svn/asterisk/branches/1.4
    
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      r312174 | alecdavis | 2011-04-01 21:29:49 +1300 (Fri, 01 Apr 2011) | 23 lines
      
      voicemail: get real last_message_index and count_messages, ODBC resequence
      
      change last_message_index to read the max msgnum stored in the database
      change count_messages to actually count the number of messages.
      
      last_message_index change:
        This fixed overwriting of the last message if msgnum=0 was missing.
        Previously every incoming message would overwrite msgnum=1.
      count_messages change:
        allows us to detect when requencing is required in opneA_mailbox.
      resequence enabled for ODBC storage:
        Assists with fixing up corrupt databases with gaps, but only when
        a user actively opens there mailboxes.
      
      (closes issue #18692,#18582,#19032)
      Reported by: elguero
      Patches: 
            based on odbc_resequence_mailbox2.1.diff uploaded by elguero (license 37)
      Tested by: elguero, nivek, alecdavis
      
      Review: https://reviewboard.asterisk.org/r/1153/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@312212 65c4cc65-6c06-0410-ace0-fbb531ad65f3