Don't respond with getdata for legacy inv types when spork15 is active (#2528)
Don't respond with getdata for legacy inv types when spork15 is active (#2528)

Avoid unnecessary traffic from non-upgraded nodes.
ivansib/sibcoin,ivansib/sibcoin,ivansib/sibcoin,ivansib/sibcoin,ivansib/sibcoin,ivansib/sibcoin