implement draft/no-implicit-names

gencapdefs.py

         url="https://github.com/ircv3/ircv3-specifications/pull/506",
         standard="IRCv3",
     ),
+   CapDef(
+        identifier="NoImplicitNames",
+        name="draft/no-implicit-names",
+        url="https://github.com/ircv3/ircv3-specifications/pull/527",
+        standard="proposed IRCv3",
+    ),
 ]
 
 def validate_defs():

irc/caps/defs.go

 
 const (
 	// number of recognized capabilities:
-	numCapabs = 33
+	numCapabs = 34
 	// length of the uint32 array that represents the bitset:
 	bitsetLen = 2
 )
 	// https://github.com/ircv3/ircv3-specifications/pull/398
 	Multiline Capability = iota
 
+	// NoImplicitNames is the proposed IRCv3 capability named "draft/no-implicit-names":
+	// https://github.com/ircv3/ircv3-specifications/pull/527
+	NoImplicitNames Capability = iota
+
 	// Persistence is the proposed IRCv3 capability named "draft/persistence":
 	// https://github.com/ircv3/ircv3-specifications/pull/503
 	Persistence Capability = iota
 		"draft/languages",
 		"draft/message-redaction",
 		"draft/multiline",
+		"draft/no-implicit-names",
 		"draft/persistence",
 		"draft/pre-away",
 		"draft/read-marker",

irc/channel.go

 	if rb.session.client == client {
 		// don't send topic and names for a SAJOIN of a different client
 		channel.SendTopic(client, rb, false)
-		channel.Names(client, rb)
+		if !rb.session.capabilities.Has(caps.NoImplicitNames) {
+			channel.Names(client, rb)
+		}
 	} else {
 		// ensure that SAJOIN sends a MODE line to the originating client, if applicable
 		if givenMode != 0 {
 		sessionRb.Add(nil, client.server.name, "MARKREAD", chname, client.GetReadMarker(chcfname))
 	}
 	channel.SendTopic(client, sessionRb, false)
-	channel.Names(client, sessionRb)
+	if !session.capabilities.Has(caps.NoImplicitNames) {
+		channel.Names(client, sessionRb)
+	}
 	sessionRb.Send(false)
 }
 

irc/handlers.go

 					targetRb.Add(nil, targetPrefix, "JOIN", newName)
 				}
 				channel.SendTopic(mcl, targetRb, false)
-				channel.Names(mcl, targetRb)
+				if !targetRb.session.capabilities.Has(caps.NoImplicitNames) {
+					channel.Names(mcl, targetRb)
+				}
 			}
 			if mcl != client {
 				targetRb.Send(false)