When a nick collision occurs do not assume the other side is aware of my

decision on which side has won if the other side is TS6. Due to
SVSCLOAK being able to change users' host at any time, there is no
guarentee two servers will agree on a user's host at any time, which
makes assuming what the other side has decided on if the users colliding
are the same dangerous, and can result in ghosted remote users.