project_license to appdata files
Flatpak build from freeciv source tree is reported to be "proprietary" by gnome. This is likely due to .appdata not defining project_license (we only provide metada_license)
Flatpak build from freeciv source tree is reported to be "proprietary" by gnome. This is likely due to .appdata not defining project_license (we only provide metada_license)