Block nginx from buffering SSE feed
Block nginx from buffering SSE feed

By default nginx buffers all connections until they are
closed. However this is not the desired behavior for long running
connections like those seen with SSE. Add a header to the response to
block buffering.

MSch/opscode-pushy-server,chef/opscode-pushy-server,chef/opscode-pushy-server,chef/opscode-pushy-server,MSch/opscode-pushy-server