Wirecutter - Replace fences with destroyed models when cut

[BaerMitUmlaut]

When merged this pull request will:

• Add some more fence types for wirecutting
• Replace fences with destroyed models when cut where possible

Some large fences are replaced by multiple smaller fences, sometimes the whole net is removed and just a pole remains - I tried to make it look as realistic as possible. Unfortunately I could not find a suitable replacement model for one of the most used fences on Altis and Stratis (the razor wire fence just in front of the radar dome in the screenshots below).

Before	After

[BaerMitUmlaut]

Fence destruction has been moved to server side.

[PabstMirror]

• Maps can place down objects with custom size scales (separate xyz) but I don't think it's that common to do for fences
• Fences can have a geo property 'placement' = 'slopelandcontact' which makes the ground contacts all touch the terrain while keeping the poles vertical. (It sorta turns the fence into a parallelogram). As far as I know it's not something you can replicate on a mission created object.

before:

after:

This would only be an problem on sloped terrain, so we could just fallback to setDamage.

[BaerMitUmlaut]

Very interesting, I did not know about the slope feature. We could fallback to setDamage if the slope is too steep.