Merge pull request #931 from slingamn/issue930

fix #930

irc/help.go

@@ -48,7 +48,7 @@ Oragono supports the following channel modes:
   +m  |  Moderated mode, only privileged clients can talk on the channel.
   +n  |  No-outside-messages mode, only users that are on the channel can send
       |  messages to it.
-  +R  |  Only registered users can talk in the channel.
+  +R  |  Only registered users can join the channel.
   +s  |  Secret mode, channel won't show up in /LIST or whois replies.
   +t  |  Only channel opers can modify the topic.