Merged revisions 293530 via svnmerge from

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

........
  r293530 | rmudgett | 2010-11-01 12:29:30 -0500 (Mon, 01 Nov 2010) | 10 lines
  
  Analog 3-way call would not connect all parties if one was using sig_pri.
  
  Also the "dahdi show channel" would not show the correct 3-way call
  status.
  
  * Synchronized the inthreeway flag between chan_dahdi and sig_analog.
  
  * Fixed a my_set_linear_mode() sign error and made take an analog sub
  channel enum.
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@293531 65c4cc65-6c06-0410-ace0-fbb531ad65f3