Add more blocks to physics control

[LadyCailinBot]

WORLDGUARD-3884 - Reported by CoolDev457

Hello,

In the physics config :
physics:
no-physics-gravel: true
no-physics-sand: true

It would be nice, with the new blocks of 1.11, to add no-physics-concrete-powder: true
And maybe at the same time no-physics-anvil.

Best regards,

MFreeware

[lt-tim]

any idea of when this will be added?