[Nmh-workers] charsets

[Lyndon Nerenberg]

1) on input (inc, slocal, etc), we convert to UTF-8 [1]

2) on output, we convert to whatever the environment wants.

3) Everything inside the code/disk-storage uses UTF-8.

Ditch stdio in favour of bio and we are 90% of the way there. Incorporate bio 
in the build tree and we have no external dependencies.

[1] http://plan9.bell-labs.com/magic/man2html/2/bio