[IRCServices] NS REGISTER and LINK

[Andrew Church]

>Bad thing: Guest nicks can apparantly be registered/linked.

Can't reproduce:

[after /nick Guest1050201837]
-> *NickServ* register password email at example.com
-NickServ- Nickname Guest1050201837 may not be registered.

  --Andrew Church
    achurch at achurch.org
    http://achurch.org/