ci: Add basic pull request checker

We check style with my hacky style checker and also make sure the email
address of the author doesn't have noreply in it.

Sponsored by:		Netflix

.github/workflows/prereq.yml

@@ -0,0 +1,27 @@
+---
+name: Quick Checker
+
+on:
+  push:
+    branches: [ 'ci-*' ]
+  pull_request:
+    branches: [ 'main' ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 11
+      - name: Check Email
+        run:  sh ./tools/build/check-email.sh HEAD~10..HEAD
+      - name: Hack
+        run: git log -1
+      - name: Check Style
+        run:  ./tools/build/checkstyle9.pl HEAD~10..HEAD

tools/build/check-email.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# Quick check to make sure all emails in the branch are good
+# Anything with noreply in the address
+
+bad=$(git log --prety="%ae" "$@" | grep noreply)
+if [ -n "${bad}" ] ; then
+    echo "Found the following bad email addresses: ${bad}"
+    exit 1
+fi
+exit 0