Resolve apply_to name clash in [resistance]

[gfgtdf]

currently [resistance] has a apply_to=blade/impact... attribute, most other attack related abilities have a apply_to=self/opponent/both attribute, it'd be nice if we could rename [resistance] apply_to= attribute to use apply_to= for apply_to=self/opponent/both like the other abilities to. I'm currently thinking of renaming it do damage_type=blade/impact...

[Pentarctagon]

This sounds like it could impact a fairly significant number of add-ons.

[stevecotton]

[effect] also has apply_to=, so WML authors will already know that different tags use different lists with the similarly-named attribute.

I'd support printing a warning message if the value contained self/opponent/both, but I'm against renaming the attribute.

[gfgtdf]

This sounds like it could impact a fairly significant number of add-ons.

Well, it'd have a compatibility path of course

[effect] also has apply_to=,

Well yes but effects are different things, apply_to is a basic attribute for attack related abilities, and in just one ability it does something completely different