review fix

irc/channel.go

@@ -707,7 +707,7 @@ func (channel *Channel) Join(client *Client, key string, isSajoin bool, rb *Resp
 		}
 
 		if details.account == "" &&
-			(channel.flags.HasMode(modes.RegisteredOnly) || channel.server.Defcon() <= 3) {
+			(channel.flags.HasMode(modes.RegisteredOnly) || channel.server.Defcon() <= 2) {
 			return errRegisteredOnly
 		}
 	}

irc/handlers.go

@@ -2067,6 +2067,10 @@ func dispatchMessageToTarget(client *Client, tags map[string]string, histType hi
 		tnick := tDetails.nick
 
 		details := client.Details()
+		if details.account == "" && server.Defcon() <= 3 {
+			rb.Add(nil, server.name, ERR_NEEDREGGEDNICK, client.Nick(), tnick, client.t("Direct messages from unregistered users are temporarily restricted"))
+			return
+		}
 		nickMaskString := details.nickMask
 		accountName := details.accountName
 		var deliverySessions []*Session

irc/help.go

@@ -175,8 +175,8 @@ spam or other hostile activity. It has five levels, which are cumulative
 
 5: Normal operation
 4: No new account or channel registrations
-3: All channels are +R; no changes to vhosts
-2: No new unauthenticated connections
+3: All users are +R; no changes to vhosts
+2: No new unauthenticated connections; all channels are +R
 1: No new connections except from localhost or other trusted IPs`,
 	},
 	"deoper": {