Set proxy_host_buffering to off

This fixes an issue with Jenkins, where jenkins-cli.jar API connections
would not work correctly behind nginx.

More information: https://support.cloudbees.com/hc/en-us/articles/360040999411--HTTP-full-duplex-channel-timeout-when-using-the-Jenkins-CLI

Change-Id: I87678f5aeb6ac819b2ef29c81b7eca8a97840404
1 file changed