Function tox_packet::toxid::xor_checksum

pub fn xor_checksum(lhs: [u8; 2], rhs: [u8; 2]) -> [u8; 2]

Calculate XOR checksum for 2 [u8; 2].

Used for calculating checksum of ToxId.

https://zetok.github.io/tox-spec/#tox-id , 4th paragraph.