Hints for helpman in main

Hints

• asv-screenshot-media-url-not-secure
  <code>org.gnome.helpman.appdata.xml:35</code> - <em>http://screenshots.debian.net/screenshots/000/016/177/large.png</em><br/>Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-screenshot-media-url-not-secure
  <code>org.gnome.helpman.appdata.xml:38</code> - <em>http://screenshots.debian.net/screenshots/000/016/176/large.png</em><br/>Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-screenshot-media-url-not-secure
  <code>org.gnome.helpman.appdata.xml:41</code> - <em>http://screenshots.debian.net/screenshots/000/016/175/large.png</em><br/>Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-screenshot-media-url-not-secure
  <code>org.gnome.helpman.appdata.xml:44</code> - <em>http://screenshots.debian.net/screenshots/000/016/174/large.png</em><br/>Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-desktop-app-launchable-omitted
  <code>org.gnome.helpman.appdata.xml</code> - <em></em><br/>This `desktop-application` component has no `desktop-id` launchable tag, however it contains all the necessary information to display the application. The omission of the launchable entry means that this application can not be launched directly from installers or software centers. If this is intended, this information can be ignored, otherwise it is strongly recommended to add a launchable tag as well.
• asv-content-rating-missing
  <code>org.gnome.helpman.appdata.xml</code> - <em></em><br/>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/
• asv-developer-info-missing
  <code>org.gnome.helpman.appdata.xml</code> - <em></em><br/>This component contains no `developer` element with information about its author.