Add slipstream-client-linux-amd64 to release CI

Builds slipstream-client from source on ubuntu-latest and includes it
in release artifacts. Windows not supported by slipstream-rust upstream.

Author: SamNet-dev

.github/workflows/release.yml

@@ -50,15 +50,44 @@ jobs:
           name: findns-${{ matrix.suffix }}
           path: findns-${{ matrix.suffix }}
 
+  build-slipstream:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install build deps
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y cmake pkg-config libssl-dev git
+
+      - uses: dtolnay/rust-toolchain@stable
+
+      - name: Clone slipstream-rust
+        run: git clone --recursive https://github.com/Mygod/slipstream-rust.git /tmp/slipstream-rust
+
+      - name: Build slipstream-client
+        working-directory: /tmp/slipstream-rust
+        env:
+          PICOQUIC_AUTO_BUILD: '1'
+        run: cargo build -p slipstream-client --release
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: slipstream-client-linux-amd64
+          path: /tmp/slipstream-rust/target/release/slipstream-client
+
   release:
-    needs: build
+    needs: [build, build-slipstream]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/download-artifact@v4
         with:
           path: artifacts
           merge-multiple: true
 
+      - name: Rename slipstream binary
+        run: |
+          mv artifacts/slipstream-client artifacts/slipstream-client-linux-amd64 2>/dev/null || true
+
       - name: Create release
         uses: softprops/action-gh-release@v2
         with: