Enabling USER_IN_BLOCKLIST

[Roberto Puzzanghera via users]

Hello,
I have plenty of these in my headers

0.0 USER_IN_BLOCKLIST      From: user is listed in the block-list
100 USER_IN_BLACKLIST      DEPRECATED: See USER_IN_BLOCKLIST
but I don't know how to get USER_IN_BLOCKLIST working in place of 
USER_IN_BLACKLIST.

Any help appreciated

Greetings, Roberto