Created by: holm
It seems https://github.com/OptimalBits/bull/commit/dc5fac0d6b315fa8c387b1b8b7dba589ede3399b#diff-b68fbb0f945cdf9cddec65ddf0fbe456R98 unintentionally broke the use of a custom createClient function. I am guessing this was done via search/replace.