srp

Revert "srp: add HomeKit-compatible padding options for u and M1/M2" #482

Job	Run time
test (1.85)	42s
build (stable, thumbv7em-none-eabi)	25s
build (stable, wasm32-unknown-unknown)	22s
build (1.85, wasm32-unknown-unknown)	23s
test (stable)	41s
build (1.85, thumbv7em-none-eabi)	25s
	2m 58s

Provide feedback