[nginx] HTTP/2: avoid adding Content-Length for requests without body.

details: http://hg.nginx.org/nginx/rev/12b1df4c9944 branches: stable-1.10 changeset: 6754:12b1df4c9944 user: Valentin Bartenev date: Thu Jun 16 20:55:11 2016 +0300 description: HTTP/2: avoid adding Content-Length for requests without body. There is no reason to add the "Content-Lengt

[nginx] HTTP/2: avoid adding Content-Length for requests without body.

details: http://hg.nginx.org/nginx/rev/78533a74af11 branches: changeset: 6589:78533a74af11 user: Valentin Bartenev date: Thu Jun 16 20:55:11 2016 +0300 description: HTTP/2: avoid adding Content-Length for requests without body. There is no reason to add the "Content-Length: 0" heade