MNT: Refresh gh-pages deploy script

.travis.yml

@@ -36,4 +36,4 @@ script:
   - xvfb-run make test
 
 after_success:
-  - if [ "$GH_PASSWORD" ] && [ $CC = "gcc" ]; then cd ..; .travis/man2html.sh; fi
+  - if [ "$TRAVIS_BRANCH" = "$TRAVIS_TAG" ] && [ $CC = "gcc" ]; then cd ..; .travis/deploy-gh-pages.sh; fi

.travis/deploy-gh-pages.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# If man had changed, rebuild its HTML and push to gh-pages
+
+set -eu
+
+[ "$GH_PASSWORD" ] || exit 12
+
+head=$(git rev-parse HEAD)
+
+git clone -b gh-pages "https://kernc:$GH_PASSWORD@github.com/$TRAVIS_REPO_SLUG.git" gh-pages
+groff -wall -mandoc -Thtml doc/xsuspender.1 > gh-pages/xsuspender.1.html
+cd gh-pages
+
+ANALYTICS="<script>window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;ga('create','UA-43663477-3','auto');ga('require','cleanUrlTracker',{indexFilename:'index.html',trailingSlash:'add'});ga('require','outboundLinkTracker',{events:['click','auxclick','contextmenu']});ga('require', 'maxScrollTracker');ga('require', 'pageVisibilityTracker');ga('send', 'pageview');setTimeout(function(){ga('send','event','pageview','view')},15000);</script><script async src='https://www.google-analytics.com/analytics.js'></script><script async src='https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js'></script>"
+sed -i "s#</body>#$ANALYTICS</body>#i" xsuspender.1.html
+
+git add *
+git diff --staged --quiet && echo "$0: No changes to commit." && exit 0
+git commit -am "CI: Update xsuspender.1.html from $TRAVIS_TAG ($head)"
+git push