AppStream Report for Debian - Issues for freeciv-client-extras in buster/main

Warnings

metainfo-validation-issue
Validation of the metainfo file found a problem: The component ID is not a reverse domain-name. Please update the ID and that of the accompanying .desktop file to follow the latest version of the Desktop-Entry and AppStream specifications and avoid future issues.

metainfo-validation-hint
Validation of the metainfo file yielded the following hint: Consider using a secure (HTTPS) URL for 'http://images1.wikia.nocookie.net/__cb20120308234702/freeciv/images/thumb/4/43/Hex2.3.png/1000px-Hex2.3.png'
metainfo-validation-hint
Validation of the metainfo file yielded the following hint: The component ID [freeciv-mp-gtk3.desktop] contains a hyphen/minus. Using a hyphen is strongly discouraged, to keep interoperability with other tools such as D-Bus. Ideally, replace any hyphens with an underscore ('_')
metainfo-validation-hint
Validation of the metainfo file yielded the following hint: The id tag for "freeciv-mp-gtk3.desktop" still contains a 'type' property, probably from an old conversion.
metainfo-validation-hint
Validation of the metainfo file yielded the following hint: Consider using a secure (HTTPS) URL for 'http://www.freeciv.org/'

missing-desktop-file
Found an AppStream metainfo XML file, but the associated .desktop file is missing. This often happens when the .desktop file is renamed, but the <launchable type="desktop-id"/> tag value of the AppStream metainfo file is not adapted as well, or if the metainfo file is located in a different package than the .desktop file.
Please fix the packaging or work with upstream to resolve this issue.
For older metadata, the desktop-id is inferred from the <id/> tag. If the component metadata has no launchable tag and no icon tag of type stock, check if a .desktop file named after the component-ID is located in the same package.