If you have been using remote debugging in Vagrant, make sure you
"enable-role zend". Otherwise your debugger will no longer receive any
callbacks from Vagrant. This is due to the recent change to HHVM by default.
There has been some ideas to allow both zend & hhvm to coexist at the same
time on the same vagrant on different ports and be debuggable via the same
xdebug interface, but that hasn't been done yet, nor is it known if it's