channels/chan_dahdi.c

channels/chan_dahdi.c
*  Added doxygen comments to the major dahdi structures.
*  Fixed PRI and SS7 using an incorrect string value if the extension
delimiter is not present in the Dial() function.
*  Fixed SS7 not checking if the dialed extension is at least as long
as the stripmsd option.
*  Fixed PRI not handling unknown TON/NPI prefix letters correctly.
*  Fixed some uninitialized string variables on FXS ports.

configs/chan_dahdi.conf.sample
*  Updated some documentation.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@172400 65c4cc65-6c06-0410-ace0-fbb531ad65f3