bind keys download remove lookaside
Please see http://ftp.isc.org/isc/bind9/keys/9.11/ (which is linked from https://www.isc.org/bind-keys/)
Please remove the lookaside key data to catch up to Oct. 2017: https://gitlab.isc.org/isc-projects/bind9/-/blob/f29359299aaab519f39b090cd83de85cd2fc3820/bind.keys