Add libsodium to the tree and build what's needed from source.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3859 ed5197a5-7fde-0310-b194-c3ffbd925b24

deps/libsodium/.github/workflows/codeql-analysis.yml

@@ -0,0 +1,30 @@
+name: "CodeQL scan"
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: "0 17 * * 2"
+
+jobs:
+  CodeQL-Build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        with:
+          languages: cpp
+
+      - run: |
+          ./autogen.sh -s
+          env CPPFLAGS="-DDEV_MODE=1" ./configure --disable-dependency-tracking
+          make -j $(nproc) check
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1