MHN/MHSHOW/MHLIST/MHSTORE
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* add way so user can tell mhn to use internal method for
MHN/MHSHOW/MHLIST/MHSTORE
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* add way so user can tell mhn to use internal method for
* Add -version to mshcmd.c for each command.
* Change msh to use mbox style files, instead of mmdf. Add options -mbox,
-mmdf to choose.
* Add -version to mshcmd.c for each command.
* Change msh to use mbox style files, instead of mmdf. Add options -mbox,
-mmdf to choose.