[Twisted-Python] plugin vs. dropin

[Phil Christensen]

i was going through the docs, and i found the two classes in
twisted/python/plugin.py, and i was wondering what the difference is
between the two.

i'd like to be able to make a sort of plugin that when the plugin package
is in the path, it interacts in arbitrary ways with my main application.
however, i don't think i'd want it to appear in mktap, as that doesn't
really make sense in this situation.....or does it?

-phil