test older client versions

.github/workflows/ci.yaml

@@ -112,7 +112,67 @@ jobs:
           sudo apt install libjansson4 libcap2 libbsd0 libreadline8 libicu66
           sudo mkdir -p /etc/samba /var/lib/samba/private
           echo "[global]\nclient min protocol = SMB2\nclient max protocol = SMB3" | sudo tee /etc/samba/smb.conf
-          sudo wget "https://github.com/icewind1991/smbclient-builder/releases/download/v0.1.0/smbclient-${{ matrix.client-version }}" -O /usr/local/bin/smbclient
+          sudo wget -q "https://github.com/icewind1991/smbclient-builder/releases/download/v0.1.1/smbclient-${{ matrix.client-version }}" -O /usr/local/bin/smbclient
+          sudo chmod +x /usr/local/bin/smbclient
+      - uses: actions/checkout@v2
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.0
+          extensions: apcu, smbclient
+          coverage: pcov
+      - name: Composer
+        run: composer install
+      - name: Config
+        run: |
+          echo '{"host": "localhost","user": "test","password": "test","share": "test","root": ""}' > tests/config.json
+      - name: PHPUnit Tests
+        uses: nick-invision/retry@v2
+        with:
+          timeout_minutes: 2
+          max_attempts: 3
+          retry_on: timeout
+          command: php ./vendor/bin/phpunit tests -c tests/phpunit.xml --coverage-clover=coverage.xml
+        env:
+          BACKEND: smbclient
+      - uses: codecov/codecov-action@v1
+        with:
+          files: ./coverage.xml
+
+  smb-old-client-versions:
+    runs-on: ubuntu-20.04
+    name: Unit tests
+
+    strategy:
+      fail-fast: false
+      matrix:
+        client-version:
+          - "4.6.16"
+          - "4.5.16"
+          - "4.4.16"
+          - "4.3.13"
+          - "4.2.14"
+        server-version:
+          - "latest"
+
+    services:
+      samba:
+        image: "servercontainers/samba:${{ matrix.server-version }}"
+        env:
+          ACCOUNT_test: test
+          UID_test: 1000
+          SAMBA_VOLUME_CONFIG_test: "[test]; path=/tmp; valid users = test; guest ok = no; read only = no; browseable = yes"
+        ports:
+          - 139:139
+          - 445:445
+
+    steps:
+      - name: Setup smbclient
+        run: |
+          sudo apt install libjansson4 libcap2 libbsd0 libreadline8 libicu66
+          sudo mkdir -p /etc/samba /var/lib/samba/private
+          echo "[global]\nclient min protocol = SMB2\nclient max protocol = SMB3" | sudo tee /etc/samba/smb.conf
+          sudo wget -q "https://github.com/icewind1991/smbclient-builder/releases/download/v0.1.1/smbclient-${{ matrix.client-version }}" -O /usr/local/bin/smbclient
           sudo chmod +x /usr/local/bin/smbclient
       - uses: actions/checkout@v2
       - name: Setup PHP