Add support for some modules to use a module.$NAME.args config section
to override the arguments of the module. Update the docs.
Add more conditions to the module loading, use !false to also load the
module when the condition is not set and so that we don't have to
explicitly set each condition to true.
Improve module-profiler example config.
There is no need to start jackdbus via dbus service activation,
because this module is only interested in reacting to the jack server
starting/shutting down, it does not actually want to make use of jack
itself.
