Initial HTTP/3 and QPACK implementation

Cowlib now uses GitHub Actions for CI. As a result
of this change, Cowlib is tested against OTP-24+.

This commit adds initial implementations of
cow_http3, cow_http3_machine and cow_qpack.

Because QPACK is similar to HPACK, some encoding and
decoding functions were moved to a common include file,
particularly the huffman functions.

The cow_http module now contains the types and functions
common to all or most versions of HTTP. The types and
functions specific to HTTP/1 were moved to the new
cow_http1 module.

Because HTTP/3 is similar to HTTP/2, part of the code
processing headers is common and can be found in
cow_http. Other functions common to both versions
were moved out of cow_http2_machine.

This commit updates comments indicating that the HTTP/2
PRIORITY mechanism will no longer be implemented.

.github/workflows/ci.yaml

@@ -0,0 +1,70 @@
+## Use workflows from ninenines/ci.erlang.mk to test Cowlib.
+
+name: Check Cowlib
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  schedule:
+      ## Every Monday at 2am.
+      - cron: 0 2 * * 1
+
+env:
+  CI_ERLANG_MK: 1
+
+jobs:
+  cleanup-master:
+    name: Cleanup master build
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Cleanup master build if necessary
+      if: ${{ github.event_name == 'schedule' }}
+      run: |
+        gh extension install actions/gh-actions-cache
+        gh actions-cache delete Linux-X64-Erlang-master -R $REPO --confirm || true
+        gh actions-cache delete macOS-X64-Erlang-master -R $REPO --confirm || true
+      env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        REPO: ${{ github.repository }}
+
+  check:
+    name: Cowlib
+    needs: cleanup-master
+    uses: ninenines/ci.erlang.mk/.github/workflows/ci.yaml@master
+
+# The perfs tests are nice to run but typically not
+# important. So we run them after we are done with the other
+# test suites. At this point we know that Erlang was built
+# so we can just use the latest version.
+
+  perfs:
+    name: Run performance tests
+    needs: check
+    runs-on: 'ubuntu-latest'
+    if: ${{ !cancelled() }}
+    steps:
+
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Output latest Erlang/OTP version
+      id: latest_version
+      run: |
+        {
+          echo "latest<<EOF"
+          make ci-list | grep -v rc | grep -v master | tail -n1
+          echo EOF
+        } >> "$GITHUB_OUTPUT"
+
+    - name: Restore CI cache
+      uses: actions/cache/restore@v4
+      with:
+        path: |
+          ~/erlang/
+        key: ${{ runner.os }}-${{ runner.arch }}-Erlang-${{ steps.latest_version.outputs.latest }}
+
+    - name: Run perfs
+      run: make perfs LATEST_ERLANG_OTP=1

Makefile

@@ -7,11 +7,6 @@ PROJECT_VERSION = 2.13.0
 # Options.
 
 #ERLC_OPTS += +bin_opt_info
-ifdef HIPE
-	ERLC_OPTS += -smp +native
-	TEST_ERLC_OPTS += -smp +native
-endif
-
 DIALYZER_OPTS = -Werror_handling -Wunmatched_returns
 
 # Dependencies.
@@ -34,10 +29,8 @@ dep_uritemplate-tests = git https://github.com/uri-templates/uritemplate-test ma
 dep_ci.erlang.mk = git https://github.com/ninenines/ci.erlang.mk master
 DEP_EARLY_PLUGINS = ci.erlang.mk
 
-AUTO_CI_OTP ?= OTP-21+
-AUTO_CI_HIPE ?= OTP-LATEST
-# AUTO_CI_ERLLVM ?= OTP-LATEST
-AUTO_CI_WINDOWS ?= OTP-21+
+AUTO_CI_OTP ?= OTP-LATEST-24+
+AUTO_CI_WINDOWS ?= OTP-LATEST-24+
 
 # Hex configuration.
 

ebin/cowlib.app

@@ -1,8 +1,9 @@
 {application, 'cowlib', [
 	{description, "Support library for manipulating Web protocols."},
 	{vsn, "2.13.0"},
-	{modules, ['cow_base64url','cow_cookie','cow_date','cow_hpack','cow_http','cow_http2','cow_http2_machine','cow_http_hd','cow_http_struct_hd','cow_http_te','cow_iolists','cow_link','cow_mimetypes','cow_multipart','cow_qs','cow_spdy','cow_sse','cow_uri','cow_uri_template','cow_ws']},
+	{modules, ['cow_base64url','cow_cookie','cow_date','cow_hpack','cow_http','cow_http1','cow_http2','cow_http2_machine','cow_http3','cow_http3_machine','cow_http_hd','cow_http_struct_hd','cow_http_te','cow_iolists','cow_link','cow_mimetypes','cow_multipart','cow_qpack','cow_qs','cow_spdy','cow_sse','cow_uri','cow_uri_template','cow_ws']},
 	{registered, []},
 	{applications, [kernel,stdlib,crypto]},
+	{optional_applications, []},
 	{env, []}
 ]}.

erlang.mk

@@ -17,7 +17,7 @@
 ERLANG_MK_FILENAME := $(realpath $(lastword $(MAKEFILE_LIST)))
 export ERLANG_MK_FILENAME
 
-ERLANG_MK_VERSION = 61f58ff
+ERLANG_MK_VERSION = 2022.05.31-67-g61f58ff-dirty
 ERLANG_MK_WITHOUT = 
 
 # Make 3.81 and 3.82 are deprecated.
@@ -3565,7 +3565,7 @@ REBAR_DEPS_DIR = $(DEPS_DIR)
 export REBAR_DEPS_DIR
 
 REBAR3_GIT ?= https://github.com/erlang/rebar3
-REBAR3_COMMIT ?= 3f563feaf1091a1980241adefa83a32dd2eebf7c # 3.20.0
+REBAR3_COMMIT ?= 06aaecd51b0ce828b66bb65a74d3c1fd7833a4ba # 3.22.1 + OTP-27 fixes
 
 CACHE_DEPS ?= 0