Tinyifier fixes
Tinyifier fixes

- use the right config for Mercurial extractor
- use the default tinyifier if nothing is provided
- support using no tinyifier (=none or empty)

Signed-off-by: Eric S. Raymond <aaa6d807ee7ba13e9b7411fc79dd0ec6b1b30d96@thyrsus.com>

dak180/irker,boklm/irker,Southen/irker,Trellmor/irker