Re-assert +r when a registered channel is created

fedserv now handles FJOIN (channel create/burst) and sets +r on any
channel that is registered, so a registered channel regains the mode
after it empties and is recreated, and after a services relink. Single
joins arrive as IJOIN and are ignored.

src/proto/inspircd.rs

@@ -90,6 +90,11 @@ impl Protocol for InspIrcd {
                 }
                 _ => vec![],
             },
+            // FJOIN <chan> <ts> <modes> [params] :<members> — channel create/burst.
+            "FJOIN" => match tokens.next() {
+                Some(chan) if !chan.is_empty() => vec![NetEvent::ChannelCreate { channel: chan.to_string() }],
+                _ => vec![],
+            },
             "QUIT" => vec![NetEvent::Quit { uid: source.unwrap_or_default() }],
             // account-registration relay from an ircd:
             // ACCTREGISTER <reqid> <origin> <kind> <account> <p2> :<p3>
@@ -232,4 +237,14 @@ mod tests {
             "{ev:?}"
         );
     }
+
+    // FJOIN (channel create/burst) surfaces as ChannelCreate for the channel.
+    #[test]
+    fn parses_fjoin_as_channel_create() {
+        let ev = proto().parse(":0IR FJOIN #chan 1783845132 +tn :o,0IRAAAAAB:0");
+        assert!(
+            matches!(ev.as_slice(), [NetEvent::ChannelCreate { channel }] if channel == "#chan"),
+            "{ev:?}"
+        );
+    }
 }

src/proto/mod.rs

@@ -12,6 +12,9 @@ pub enum NetEvent {
     Privmsg { from: String, to: String, text: String },
     UserConnect { uid: String, nick: String },
     NickChange { uid: String, nick: String },
+    // A channel was created or bursted (InspIRCd FJOIN). Subsequent single joins
+    // arrive as IJOIN and are not surfaced.
+    ChannelCreate { channel: String },
     Quit { uid: String },
     // An ircd relaying an IRCv3 account-registration request to us as the authority.
     AccountRequest { reqid: String, origin: String, kind: String, account: String, p2: String, p3: String },