Gerrit already has "pluggable" features that need to be installed
at the early stages of the bootstrap phase and cannot be "unplugged"
as plugins do.
Attendees at the recent hackathon in Mountain View decided to
call this new entities "LibModules", and configure them in the
gerrit.config as follows:
[gerrit]
installModule = com.googlesource.gerrit.libmodule.MyModule
installModule = com.example.abc.OurSpecialSauceModule
Change-Id: Id8bf1a2e88b14c8e9125f20cb10a041d47799100