Switch to a fork of faye fixing close-before-start

This should stop all the "Got open from inactive client" errors.
Revert "include a backtrace for "got open from inactive""

This reverts commit 4378d9f5d06d333a4e0546a2583b61c6931ff8f8.

The previous commit switches to a version of Faye which fixes the bug
that causes this error to be thrown.