Blacklist/Whitelist

[Noordfrees]

Closes #97

This implements a way to selectively forbid a user to upload add-ons, upload screenshots, write and edit comments, or log in to the server; or to mark them as trusted to automatically verify their new add-ons and/or carry over the verification and quality status when upgrading an add-on.
More fine-grained controls (i.e., on a per-add-on basis) can be added if we ever need them.

Users who have deleted themselves or who were deleted or inactivated can no longer log in.

Fixes the bug from https://www.widelands.org/forum/post/38365/.

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To update your local testing environment:

alter table auth_user add is_active tinyint;
update auth_user set is_active=1 where is_active is null;
create table wlprofile_profile (id int primary key auto_increment, user_id int, deleted tinyint);
insert into wlprofile_profile (user_id) values (1),(2),(3),(4),(5),(6),(7),(8);
update wlprofile_profile set deleted=0 where deleted is null;

create table blackwhitelist (id int, action varchar(100), value tinyint, primary key (id,action));

[hessenfarmer]

Test comment for the mirror bot