integrated the extended server info to improve real duplicate accounts

[mckaygerhard]

we ned a lua way to send the native local ip to server..

but in ipv6 mode this is not necessary.. so we need to check ip version and then later check if client send us local ip.. if local ip are equal.. we can process some filters..

[mckaygerhard]

also each client can send fake ips to server so we need to also check the extended client info from this commit https://codeberg.org/minenux/minetest-engine/commit/6fb6a249f2396f0a509fd82a427bad22084b1a3d

enabled only if you build developer mode.. but the patch made by him enables for any build..