CH3 And Channels
From Mpich2
TODO: port from http://www.mcs.anl.gov/research/projects/mpich2/olddeveloper/design/ch32channel.htm and http://www.mcs.anl.gov/research/projects/mpich2/olddeveloper/design/ch3parms.htm
Note the documents listed above are very out of date. A lot has changed in ch3 and the channel interface since these were written. It's been said that no documentation is better than bad documentation, so read the above at your own risk.
