Merge pull request #631 from github/https-test

Don't allow links to non-https sites

.travis.yml

@@ -12,6 +12,9 @@ addons:
     packages:
     - libcurl4-openssl-dev
 
+before_install:
+  - gem update --system
+
 branches:
   only:
     - gh-pages

_includes/header.html

@@ -4,7 +4,7 @@
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
 
-    <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Chivo:900">
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Chivo:900">
     <link rel="stylesheet" href="/assets/css/application.css?v={{ site.github.build_revision }}">
     <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
     <!--[if lt IE 9]>

about.md

@@ -20,8 +20,6 @@ See our [appendix](/appendix/) for a table of all of the licenses cataloged in t
 
 * Open Source Initiative's FAQ on [Which Open Source license should I choose to release my software under?](https://opensource.org/faq#which-license)
 * Free Software Foundation's [advice on how to choose a license](https://www.gnu.org/licenses/license-recommendations.en.html)
-* [License differentiator](http://www.oss-watch.ac.uk/apps/licdiff/) ([source](https://github.com/ox-it/licdiff)) from [OSS Watch](http://www.oss-watch.ac.uk/)
-* [Free/Libre/Open Source license selection wizard](http://vrici.lojban.org/~cowan/floss/) by John Cowan
 * [The Legal Side of Open Source](https://opensource.guide/legal/), an Open Source Guide covering licensing and related issues
 
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