CutRight slices string around the last occurrence of sep returning the text before and after sep.

SplitRequest searches for "if" or "unless" and returns result.

StringExtractComment checks if comment is added.

StringSplitIgnoreEmpty while spliting, removes empty items.

StringSplitWithCommentIgnoreEmpty while splitting, removes empty items, if we have comment, separate it.

Expression is standard HAProxy expression formed by a sample-fetch followed by some converters.