David Keller

Add options to use system abseil, lz4 and cityhash

12

This change closes #86, and closes #99. Furthermore, it eases Conan packaging, as Conan already provides abseil, lz4 and cityhash. Signed-off-by: David Keller

PostRepository::getIndexForNumber() walks 2 time the posts table to get offset

6

### Current Behavior When showing discussion with a large number of posts, flarum pressures the database when calling ``` public function getIndexForNumber(int $discussionId, int $number, ?User $actor = null): int...

Hi, I can't serialize a class `T` marked as `final` because the `detail::has_memfn_serializer` metafunction relies on the following trick to detect the serialize function presence. ``` struct derived: T {...