Consistency tweaks

Spotted by Siebrand

* correct notation of CC license
** Per https://creativecommons.org/licenses/by-sa/3.0/legalcode
** https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Config-license-cc-by-nc-sa/qqq
** https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Config-license-cc-by-sa/en

* Add punctation
** https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Config-sqlite-fts3-downgrade/en
** https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Config-db-username-empty/en

* Wrap function mame in code tag
** https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Config-install-subscribe-notpossible/en

Change-Id: I3e9489943c6456eda997a7bd5ea8f3f902472001
Merge "Consistency tweaks"