Anti-aircraft gun

BUR #7954 has been approved by @Hillside_Moose.

create alias aa_gun -> anti-aircraft_gun
create alias aa_missile -> anti-aircraft_missile
create alias antiaircraft_weapon -> anti-aircraft
create implication anti-aircraft_gun -> anti-aircraft
create implication anti-aircraft_missile -> anti-aircraft

It looks much cleaner.

There's also aa missile. All three should probably be lumped into anti-aircraft weapon (not gun), in my opinion.

I agree that missiles aren't guns, but lumping them together seems strange given how visually distinct they are from one another.

Modified the BUR, though I don't know about the utility of implicating things like rocket trucks, MANPADS and AA turrets to one tag. As Shinjidude said, they're visually distinct and it will result in an umbrella for umbrella's sake.

This bulk update request is pending automatic rejection in 5 days.

The bulk update request #7954 (forum #200238) has been approved by @Hillside_Moose.

Added aa_missile to the BUR, and changed anti-aircraft_weapon to a more general anti-aircraft. Danbooru's definition of weapon means handheld weapons, and I don't want an "obvious" implication down the road.