Merge branch 'TimePath/intrusive' into 'master'

Implement intrusive lists

Provides a solution to the abuse of `find` and `findchain` (hidden behind `FOREACH_*`)

See merge request !343

diff --cc qcsrc/client/weapons/projectile.qc
Simple merge

diff --cc qcsrc/common/vehicles/vehicle/raptor_weapons.qc
Simple merge

diff --cc qcsrc/common/weapons/weapon/shockwave.qc
Simple merge

diff --cc qcsrc/server/miscfunctions.qc
Simple merge