Also testing commit signing again, different email this time.

This will help build server perform builds with copy of repo in a folder
outside the original git repo folder. Also testing signed commits on
GitHub.

Rename EC256,EC384 to P256,P384

revert to old Caddyfile on failed in-process restart

update README to include Docker container zzrot/alpine-caddy

updated README to include ZZROT's docker container that runs caddy on Alpine Linux inside of a Docker Container.

Fix for #721

Add Etag header

https: Faster tests

proxy: Allow mixed case Upgrade headers (WebSocket fix)

Caddy expects websocket to be completely lowercase.
Some applications send websocket upgrade headers like the following:
`Upgrade: WebSocket`

This change allows all variations of websocket.

tls: Customize key type with key_type

dist/init: caddy.conf for upstart

templates: Adding some useful utility functions

proxy: fix req.URL.Path for unix sockets

Correct unused assignments

golint is not part of the tests since our Markdown dependency defines
an interface that is not lint-compliant (unfortunately).
See https://github.com/russross/blackfriday/issues/240

Only bypass "bandwidth limit exceeded" errors on pushes

Add expvar middleware