Add a flag to enable Persona support

It's disabled by default. To enable, add the following to hydra.conf:

enable_persona = 1

Created by  Eelco Dolstra  on November 6, 2013
JFW656FT5JSDCA5NBNFGTJABIR2LR5VRDRYI7KF54PYNFDSL4DMAC
Change contents