Upgrade go and dependencies (#332)

* go get -u ./...; go mod tidy

* run ci on push, add recent go, update actions

* build on push to any branch

Upgrade to stdlib http (#304)

* Use separate ReverseProxy instances for TCP and IPC apps

* Switch to stdlib http.Transport for TCP proxy

* Switch to stdlib http.Transport for Unix Domain Socket proxy

http.Transport requires a custom DialContext function to be specified in
order to create a connection using Unix Domain Sockets.

* Update TCP transport to use DialContext

Dial is deprecated

* Remove unused vendored httpu package

* Extract constants for timeout values

output release checksums for homebrew

devel-release and release via github actions (#297)

* devel-release and release via github actions

* junk paths during packaging

* 1.17.6

* diff naming

* clean up tests

* cleanup consolidated test

* store pointer to AppPool

* remove test that was erroneously trying to boot puma under the hood

golang-1.17.2, update readme (#285)

* update ci golang 1.17.2

* add test for documented subdomain behavior

* format README

* remove functionality that hasn't worked in a while

* add note about domains, not just TLDs

* remove tests for legacy behavior

golang-1.16.6, don't build linux-arm

update ci to golang-1.16.5

ensure app is removed from pool after sigterm (#274)

* remove app from pool on shutdown

* add reason to log message

* ignore logs

* go mod tidy, add 1.16 to ci

* don't use circle anymore

ensure app is removed from pool after sigterm (#274)

* remove app from pool on shutdown

* add reason to log message

* ignore logs

* go mod tidy, add 1.16 to ci

* don't use circle anymore

Prevent apps with the same folder name from colliding (#270)

before this commit if two symlinks were targeting distinct folders having the same name the app were considered to be the same