fix flag spawn and make a set number of flags drop

[a-lchen]

fix flag spawn and make a set number of flags drop

[eambutu]

what else do i need to fig with flag spawn?

[eambutu]

also on second thought im not super sure if this is a positive change. There is already a really good incentive to attack people (they lose flags, also it is a good chance to get a ton of flags at once). i think there should be room in the game for a meta that is heaviliy based on collecting from the center (i think the strategy of focusing on collecting rather than attacking should still be viable). If we want to make it slightly less OP though, we can decrease the rate of flag spawn