e4c924c517 createmultisig no longer takes addresses (Gregory Sanders)
Pull request description:
Removed mention of address in help text.
Tree-SHA512: a6a752ef2282c5c893dd1a6ff5ccab42d3de1989847af627d82d41605ea19abc0aaf68567a62b6478933ba7eea09f911087b410ba7d3a815331ef15ec1ff9df0
Backport of Core PR12503
https://github.com/bitcoin/bitcoin/pull/12503/