{"action":"opened","issue":{"url":"https://api.github.com/repos/mholt/caddy/issues/531","labels_url":"https://api.github.com/repos/mholt/caddy/issues/531/labels{/name}","comments_url":"https://api.github.com/repos/mholt/caddy/issues/531/comments","events_url":"https://api.github.com/repos/mholt/caddy/issues/531/events","html_url":"https://github.com/mholt/caddy/issues/531","id":128354786,"number":531,"title":"Add backend to log options","user":{"login":"pwFoo","id":333408,"avatar_url":"https://avatars.githubusercontent.com/u/333408?v=3","gravatar_id":"","url":"https://api.github.com/users/pwFoo","html_url":"https://github.com/pwFoo","followers_url":"https://api.github.com/users/pwFoo/followers","following_url":"https://api.github.com/users/pwFoo/following{/other_user}","gists_url":"https://api.github.com/users/pwFoo/gists{/gist_id}","starred_url":"https://api.github.com/users/pwFoo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pwFoo/subscriptions","organizations_url":"https://api.github.com/users/pwFoo/orgs","repos_url":"https://api.github.com/users/pwFoo/repos","events_url":"https://api.github.com/users/pwFoo/events{/privacy}","received_events_url":"https://api.github.com/users/pwFoo/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-01-23T21:49:58Z","updated_at":"2016-01-23T21:49:58Z","closed_at":null,"body":"I will use Caddy as reverse proxy / load balancer and it looks good so far, but would be great to get backend address (proxy \"to\") logged to access.log. How could backend address / ip added?"}}