Adding upstream version 2.6.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>

.github/workflows/main.yml

@@ -0,0 +1,32 @@
+on: [push]
+name: test and build
+jobs:
+  editorconfig_lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: eclint-action
+        uses: greut/eclint-action@v0
+  go-test:
+    runs-on: ubuntu-latest
+    name: test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.22.x
+      - name: go test
+        run: go test -v ./...
+  core-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: core test
+        uses: ./.github/actions/core-test