Hints for kwave in main

Hints

• asv-url-not-secure
  org.kde.kwave.appdata.xml:143 - http://kwave.sourceforge.net/
  Consider using a secure (HTTPS) URL for this web link.
• asv-summary-has-dot-suffix
  org.kde.kwave.appdata.xml:59 - Kwave er eit lydredigeringsprogram bygd på KDE Frameworks 5.
  The component summary should not end with a dot (`.`).
• asv-content-rating-missing
  org.kde.kwave.appdata.xml -
  This component has no `content_rating` tag to provide age rating information. You can generate the tag data online by answering a few questions at https://hughsie.github.io/oars/