tree e96baf456ce3561098e2278abc7cc1ecf8a3e215
parent 98ed0a3409c1eda06e9b6bf36d063ae1f628359a
author Hanno Hecker <vetinari@ankh-morp.org> 1450608434 +0100
committer Steve Francia <steve.francia@gmail.com> 1450722859 -0500

Add RegexpFilter

- rework FilterFs to be truely chaining, i.e. every call not intercepted
  must be passed to the source Fs
- AddFilter accepts just a FilterFs, not a Fs
- FilterFs' AddFilter(FilterFs) should be implemented by any
  FilterFs like

  func (f *myFilter) AddFilter(fs FilterFs) {
       fs.SetSource(f.source)
       f.source = fs
  }