[crossfire] Metaserver reporting and accuracy

[Tchize]

Andrew Fuchs wrote:
>
> Would be easier to manage (on both sides) by having a "permanent" flag
> sent to the metaserver, that has to be explicitly set in the server
> config.
Just a though:
metaserver entries of 'permanent' server should, at least partially, be 
stored in a config file of metaserver.

For example, if I create a server named "Lands of  magic", i don't want 
someone to configure his own personal server with the same name and fool 
the players. Permanent servers should have reserved names in metaserver.
Also, metaserver should have a way to ensure the given connection ip is 
the one from which the metaserver entries are sent (currently it's only 
a matter of sending an udp packet and so metaserver could be overflowed 
by fake entries with random ips)