The motivation is to have a single immutable object providing
information about the action. It can represent the current
action being filtered, but also a past action stored in the
abuse log. It will hopefully help us get rid of passing
User(Identity) and Title/LinkTarget objects around together.
Change-Id: I52fa3a7ea14c98d33607d4260acfed3d3ba60f65
This is a plain value object that represents the action being filtered,
replacing associative arrays that were being used up to this point.
We should now check whether it's possible to make it not require an
accountname (which complicates things), and then use it in related
classes as well, e.g. Parameters.
Change-Id: I9550c14819b600c97c46b632cc1c2d447972d69c
