Initial HTTP/3 implementation

This includes Websocket over HTTP/3.

Since quicer, which provides the QUIC implementation,
is a NIF, Cowboy cannot depend directly on it. In order
to enable QUIC and HTTP/3, users have to set the
COWBOY_QUICER environment variable:

  export COWBOY_QUICER=1

In order to run the test suites, the same must be done
for Gun:

  export GUN_QUICER=1

HTTP/3 support is currently not available on Windows
due to compilation issues of quicer which have yet to
be looked at or resolved.

HTTP/3 support is also unavailable on the upcoming
OTP-27 due to compilation errors in quicer dependencies.
Once resolved HTTP/3 should work on OTP-27.

Because of how QUIC currently works, it's possible
that streams that get reset after sending a response
do not receive that response. The test suite was
modified to accomodate for that. A future extension
to QUIC will allow us to gracefully reset streams.

This also updates Erlang.mk.

test/rfc9114_SUITE_data/client.key

@@ -0,0 +1,5 @@
+-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgVJakPYfQA1Hr6Gnq
+GYmpMfXpxUi2QwDBrZfw8dBcVqKhRANCAAQDHeeAvjwD7p+Mg1F+G9FBNy+7Wcms
+HEw4sGMzhUL4wjwsqKHpoiuQg3qUXXK0gamx0l77vFjrUc6X1al4+ZM5
+-----END PRIVATE KEY-----

test/rfc9114_SUITE_data/client.pem

@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

test/rfc9114_SUITE_data/server.key

@@ -0,0 +1,5 @@
+-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgvykUYMOS2gW8XTTh
+HgmeJM36NT8GGTNXzzt4sIs0o9ahRANCAATnQOMkKbLFQCZY/cxf8otEJG2tVuG6
+QvLqUdERV2+gzE+4ROGDqbb2Jk1szyz4CfBMB4ZfLA/PdSiO+KrOeOcj
+-----END PRIVATE KEY-----

test/rfc9114_SUITE_data/server.pem

@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----