[dev] [sbase] [patch] Knock off a bunch of easy commands

[Galos, David]

I've attached a patch which updates the TODO, and adds a bunch of easy
utilities to sbase.

Included is
    * rmdir
    * printenv
    * unlink
    * sync
    * chvt
    * chgrp

sbase-add-rmdir-printenv-unlink-sync-chvt-chgrp.diff
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