Revert "Issue #26: optimize for regexes that end in .* or .+"

This reverts commit 420474ec32acecb24d4a7701f85e1daaa45f64f7.
Revert "Issue #25: make number of FFX rounds configurable, only use two rounds for FTE, for now"

This reverts commit 6f80151b8f07c3260993abeb054d2f113df9bf9c.