Helicopter AI wingmen behavior

[metzger]

1. When told to recce XXkm/miles let him hover at the new location and engage from there if told to do so instead of rejoining. This way you can do bounding overwhatch with AI. 

2. When instructed to "hold postition" let him hover and not orbit. Or ideally have a new option to clarify if he should hover or orbit.

3. When instruted to go to Datalink position, again have him hover or ideally have an option to further clarify. But better hover than orbit

For all points, when wingmen is commanded to "cover me" while on any of the above locations, let him hover and cover you from there unless instructed to rejoin. 

4. Make AI able to commit hover fire