- [feature] Reworked the startswith(), endswith(),

  - [feature] Reworked the startswith(), endswith(),
    contains() operators to do a better job with
    negation (NOT LIKE), and also to assemble them
    at compilation time so that their rendered SQL
    can be altered, such as in the case for Firebird
    STARTING WITH [ticket:2470]
  - [feature] firebird - The "startswith()" operator renders
    as "STARTING WITH", "~startswith()" renders
    as "NOT STARTING WITH", using FB's more efficient
    operator.  [ticket:2470]