TUN-4597: Add a QUIC server skeleton

- Added a QUIC server to accept streams
- Unit test for this server also tests ALPN
- Temporary echo capability for HTTP ConnectionType

vendor/github.com/lucas-clemente/quic-go/.travis.yml

@@ -0,0 +1,31 @@
+dist: xenial
+group: travis_latest
+
+language: go
+
+go:
+  - "1.14.x"
+  - "1.15.x"
+
+# first part of the GOARCH workaround
+# setting the GOARCH directly doesn't work, since the value will be overwritten later
+# so set it to a temporary environment variable first
+env:
+  global:
+    - TIMESCALE_FACTOR=20
+  matrix:
+    - TRAVIS_GOARCH=amd64 TESTMODE=integration
+    - TRAVIS_GOARCH=386 TESTMODE=integration
+
+# second part of the GOARCH workaround
+# now actually set the GOARCH env variable to the value of the temporary variable set earlier
+before_install:
+  - travis_retry go get golang.org/x/tools/cmd/cover
+  - travis_retry go get github.com/onsi/ginkgo/ginkgo
+  - travis_retry go get github.com/onsi/gomega
+  - export GOARCH=$TRAVIS_GOARCH
+  - go env # for debugging
+  - travis_retry go get -t ./...
+
+script:
+  - .travis/script.sh