[ragel] changes to Ragel in response to the CloudFlare incident

[Adrian Thurston]

I've debated a few alternatives, but I believe the correct response is 
to perform an EOF check in the code generated by fgoto in actions that 
run at EOF time. Probably specialize the action to two distinct cases 
and not touch the on-char version.

-- 
Dr. Adrian D. Thurston
Chief Scientist
Colm Networks
http://colm.net/