* Use gorilla DialContext (vulcand#158)

* Handle Te header when http2 (vulcand#157)

* fix: buffer error and go1.11. (vulcand#159)

* fix: buffer error and go1.11.

* chore: add go1.11 in Travis.

* review: comment.

* fix: use internal logger. (vulcand#160)

* fix: body should never be nil (vulcand#162)

* Pass host header for Websocket. (vulcand#163)

* feat: pass host header for Websocket.

* add tests.

* fix: golint. (vulcand#165)

* Flush when we have unannonced trailers (vulcand#168)

* Flush when we have unannonced trailers

* Remove 1.8, not supported in golint anymore

* add missing callback on close of hijacked connections (vulcand#175)

* Allowing sticky session's affinity cookies to be created with more options such as HttpOnly or Secure (vulcand#174)

* Ensuring the CookieOption struct's fields are exported (vulcand#179)

* ensuring the CookieOption struct's fields are exported (vulcand#174)

* dep ensuring

* Updating failing test, I should pay more attention

* dep ensuring has caused problems, reverting. Although this is really strange that dep should do this

* chore: migrate to go module. (vulcand#182)

* Update README.md

Go library change godoc to "pkg.go.dev"

* feat: add more cookie options. (vulcand#195)

* chore: update dependencies.

* feat: add more cookie options.

* chore: update travis configuration.

* Add Fallback setter on CircuitBreaker (vulcand#201)

Signed-off-by: Sylvain Rabot <sylvain@abstraction.fr>

* review.

* doc: buffer.go: s/request/response/ (vulcand#172)

* doc: typo fix /serveHTTP/serveWebSocket/s (vulcand#176)

* Make the MakeRateError delay field public so that custom RateErrHandlers can be more easily written (vulcand#206)

* fix typo (vulcand#212)

* Fix panics on ratelimit period (division by zero) (vulcand#213)

* Bump to go1.16 (vulcand#214)

* Add a mechanism to format the sticky cookie value (vulcand#216)

Co-authored-by: Tom Moulard <tom.moulard@traefik.io>
Co-authored-by: M <m@cognusion.com>
Co-authored-by: Sylvain Rabot <sylvain@abstraction.fr>

* Do not use global websocket.DefaultDialer

This change makes it so that each forward gets its own dialer rather
then all sharing the global `websocket.DefaultDialer`. It fixes the flaky
`TestWebSocketNumGoRoutine` test and allows `WebsocketTLSClientConfig` to
set a different TLS config than the one used in the http `RoundTripper`,
the TLS config in the http `RoundTripper` will still be used as a
fallback if one wasn't set by the user.

Adds the new `optSetter` `WebsocketNetDialContext` to set a custom
DialContet for WebSocket use.

-  `go test -run=TestWebSocketNumGoRoutine -count=100 ./forward` now
   passes. Removed the skip directive.
-  Closes vulcand#199
-  Closes vulcand#125

* Revert un-skipping test

* Update: Cleanup local and remote merged changes

Co-authored-by: SALLEYRON Julien <julien.salleyron@gmail.com>
Co-authored-by: Ludovic Fernandez <ldez@users.noreply.github.com>
Co-authored-by: Michael <mmatur@users.noreply.github.com>
Co-authored-by: ravilr <raviprasad_lr@yahoo.com>
Co-authored-by: Amir Keibi <gheibia@users.noreply.github.com>
Co-authored-by: colynn.liu <colynnliu@foxmail.com>
Co-authored-by: Sylvain Rabot <sylvain@abstraction.fr>
Co-authored-by: Fernandez Ludovic <lfernandez.dev@gmail.com>
Co-authored-by: colynn.liu <colynn.liu@gmail.com>
Co-authored-by: Wes Turner <50891+westurner@users.noreply.github.com>
Co-authored-by: Ben Yanke <ben@benyanke.com>
Co-authored-by: Peter C <somethingnew2-0@users.noreply.github.com>
Co-authored-by: Iman Sahebi <iman.s_sani@yahoo.com>
Co-authored-by: Douglas De Toni Machado <douglas.machado@traefik.io>
Co-authored-by: Romain <rtribotte@users.noreply.github.com>
Co-authored-by: Jean-Baptiste Doumenjou <925513+jbdoumenjou@users.noreply.github.com>
Co-authored-by: Tom Moulard <tom.moulard@traefik.io>
Co-authored-by: M <m@cognusion.com>
Co-authored-by: Clifton Kaznocha <ckaznocha@users.noreply.github.com>
Co-authored-by: Clifton Kaznocha <ckaznocha@gmail.com>