Show ruleset name in metaserver server page if server has sent it

- Existing databases need to be updated
- Current Freeciv server does not send the ruleset information.
  This is metaserver side support for future version.

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
Made name of the fcweb ruleset "Web-default"

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
Send ruleset name to metaserver

This is backport of freeciv patch #5229

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>