New male focus aliases for findability

BUR #18596 has been approved by @evazion.

create alias boys_only -> male_focus

Male focus has always been one of those tags that new users never find out about unless someone explicitly tells them about it for years now, so this thread will be an attempt at making it more easily discoverable.

Feel free to make a new BUR below if anyone can think of any other general aliases that can help.

BUR #18597 has been approved by @evazion.

create alias guys_only -> male_focus

I've seen some hentai sites use this term occasionally. On others it's simply aliased to males_only. So it could be useful too.

The bulk update request #18596 (forum #248830) has been approved by @evazion.

The bulk update request #18597 (forum #248833) has been approved by @evazion.