apply viewing permission constraint when searching for posts.
apply viewing permission constraint when searching for posts.

Skips searching in forums user doesn't have permission to view; doesn't
affect inability to view the actual forum itself.

kj415j45/osu-web,kj415j45/osu-web,omkelderman/osu-web,ppy/osu-web,nekodex/osu-web,omkelderman/osu-web,notbakaneko/osu-web,LiquidPL/osu-web,notbakaneko/osu-web,kj415j45/osu-web,ppy/osu-web,ppy/osu-web,omkelderman/osu-web,nanaya/osu-web,ppy/osu-web,LiquidPL/osu-web,notbakaneko/osu-web,omkelderman/osu-web,LiquidPL/osu-web,nanaya/osu-web,nekodex/osu-web,ppy/osu-web,nanaya/osu-web,nanaya/osu-web,LiquidPL/osu-web,nekodex/osu-web,nanaya/osu-web,notbakaneko/osu-web,notbakaneko/osu-web,kj415j45/osu-web,nekodex/osu-web,LiquidPL/osu-web,nekodex/osu-web