Adphi

Close received after close

5

Somewhere between v1.8.10 and v1.8.11 (probably b0ec2015), Websockets stopped working on Chrome (android) with the following error: ``` WebSocket connection to 'wss://[...]' failed: Close received after close ````

### 1. Why is this pull request needed and what does it do? Adds optional PROXY protocol (v1/v2) support. Introduces a proxyproto plugin and listener/packet-conn wrappers so CoreDNS can obtain...