facebook/hhvm — pull request #2310 by danslo (2014-04-03 16:45:44+00:00)
Title: set default HTTP_VERSION in fastcgi transport

Flushing the output buffer before the end of request requires a
HTTP_VERSION of 1.1 in HHVM. FastCGI will currently set this to an empty
string when it is not specified in webserver configuration.

If we don't get a HTTP_VERSION header, just set it to the default
Transport HTTP version.

Closes #2256.