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faq: add point about maxnicklen misconfigurations and relay

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(cherry picked from commit c7f300357c)
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James Lu 2017-07-30 07:54:58 -05:00
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docs/faq.md
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@ -35,3 +35,9 @@ In no particular order:
- Proper protocol negotiation leading to fewer DoS possibilities:
- Better support for channel modes such as +fjMOR, etc.
- Configurable nick length limits for relayed users.
### My IRCd SQUITs the relay server with errors like "Bad nickname introduced"!
First, check whether the SQUIT message includes the nick that triggered the netsplit. If this nick includes any characters not allowed in regular IRC, such as the slash ("/"), or is otherwise an invalid nick (e.g. beginning with a hyphen or number), this likely indicates a bug in PyLink Relay. These problems should be reported on the issue tracker!
However, if the nick mentioned is legal on IRC, this issue is likely caused by a max nick length misconfiguration: i.e. the relay server is introducing nicks too long for the target network. This can be fixed by setting the `maxnicklen` option in the affected network's PyLink `server:` block to the same value as that network's `005` `NICKLEN` (that is, the `NICKLEN=<num>` value in `/raw version`).