Hints for dia in main

Hints

• asv-summary-has-dot-suffix
  :47 - Dia — програма для малювання діаграм.
  The component summary should not end with a dot (`.`).
• asv-url-not-secure
  :143 - http://www.gnome.org/friends/
  Consider using a secure (HTTPS) URL for this web link.
• asv-nonstandard-gnome-extension
  :156 - kudos
  This tag is a GNOME-specific extension to AppStream and not part of the official specification. Do not expect it to work in all implementations and in all software centers.