S3_1 effect_to_enabler(): Divide reqs to actor and target ones
TODO comment in S3_1 rscompat.c:effect_to_enabler():
"Divide requirements to actor_reqs and target_reqs depending their type."
That really should be done before we release 3.1, to better support automatic (and correct) ruleset upgrade.
This is meant for S3_1 only, as that's the only branch that makes the 3.0 -> 3.1 ruleset conversion.