On hit effects and strafe/multi/guided

[adeyke]

Multi-shot was nerfed for 1.10.

Now, only the center two arrow of a multi-shot spread are able transmit most effects. The affected effects include, but are not limited to:
knockback
CTC on striking
open wounds
crushing blow
freezes target
hit blinds target

Effects that are carried on all arrows (or don't need to be carried on arrows) include:
CTC on killing
deadly/critical strike
RIP
PMH
damage

This applies only to MS.