when running in the source directory it (previously
bindctl.py) wouldn't be imported by bindctl.
Don't know if this is the best way.
Should be no change for the installed bindctl.

While here add another TODO.


git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@1415 e5f2f494-b856-4b98-b285-d166d9295462