Some consistency tweaks in preparation for adding extension to Translatewiki.net

* Add weblink to description message
* http -> https

@Maintainer: Please add message documenation
per https://www.mediawiki.org/wiki/I18n#Message_documentation

Once done, I will add the extension to Translatewiki.net. Thanks!

Change-Id: Ibf7d66ed1b037bcacaac5cfbbf02baed2f0db5c8