New Waypoint Option - Attack Point

[Exorcet]

This is mainly for AI wingmen. Since PP attack mode in some planes requires a WP to be placed over the target, I think a new waypoint class is needed to prevent the AI from flying over these waypoints.

Currently AI told to engage mission or similar will treat these target points as normal waypoints which likely makes them fly very low into hostile territory and get shot down. If we could mark these WP's as attack points or something and this label made the AI ignore the WP in terms of navigation it would help prevent them from flying around where they shouldn't.