joyent/node — pull request #7435 by bnoordhuis (2014-04-09 13:05:25+00:00)
Title: http: add request.flush() method

Forcibly flushes the request headers. You need this with long-lived
HTTP connections where the first data isn't written until the connection
has been established (think: tunneling requests over HTTP CONNECT.)

Fixes #7296.