[IRCServices Coding] Qline avoidance bug in /ns link nickname

[Andrew Church]

     Fixed with respect to guest nicks.  I'll work on the SQLINE stuff later.

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

>The protection of guest nicknames and qline protection within SQLINES and 
>IRCD.CONF QLines can be circumvented via the use of the '/ns link' command:
>
>nickserv/main: nick!user at host identified for nick Nick
>nickserv/link: nick!user at host linked nick oper to Nick
>nickserv/link: nick!user at host linked nick ircop to Nick
>nickserv/link: nick!user at host linked nick admin to Nick
>nickserv/link: nick!user at host linked nick Guest0 to Nick
>nickserv/link: nick!user at host linked nick Guest1 to Nick
>nickserv/link: nick!user at host linked nick Guest2 to Nick
>
>... etc
>
>I imagine protecting guest nicks will be a trivial matter of adding the 
>same check as used in '/ns register' to the '/ns link' command. Protecting 
>against standard QLines would like;y prove more complex. I am happy to 
>move/add all QLines to SQLines if there is a way for services to support 
>protection from registration when used in this manner. 
>
>Although the QLines will probably still protect against these registered 
>names being actually used, they will allow the primary nick to receive 
>memos to these banned nicknames and I guess there is the potential for 
>further problems. 
>
>-- 
>Mark.
>
>
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