Advertize ISUPPORT MAXTARGETS

It's probably to be as ignored as TARGMAX, but it doesn't hurt to have it

Author: progval

lib/irc/handler.ex

@@ -581,6 +581,7 @@ defmodule M51.IrcConn.Handler do
       "CHANLIMIT=",
       "CHANTYPES=#!",
       "CHATHISTORY=1000",
+      "MAXTARGETS=1",
       "PREFIX=",
       "TARGMAX=JOIN:1,PART:1",
       "UTF8ONLY",

test/irc/handler_test.exs

@@ -20,7 +20,7 @@ defmodule M51.IrcConn.HandlerTest do
 
   @cap_ls_302 ":server. CAP * LS :account-tag batch draft/account-registration=before-connect draft/channel-rename draft/chathistory draft/multiline=max-bytes=8192 echo-message extended-join labeled-response message-tags sasl=PLAIN server-time userhost-in-names\r\n"
   @cap_ls ":server. CAP * LS :account-tag batch draft/account-registration draft/channel-rename draft/chathistory draft/multiline echo-message extended-join labeled-response message-tags sasl server-time userhost-in-names\r\n"
-  @isupport "CASEMAPPING=rfc3454 CLIENTTAGDENY=*,-draft/react,-draft/reply CHANLIMIT= CHANTYPES=#! CHATHISTORY=1000 PREFIX= TARGMAX=JOIN:1,PART:1 UTF8ONLY :are supported by this server\r\n"
+  @isupport "CASEMAPPING=rfc3454 CLIENTTAGDENY=*,-draft/react,-draft/reply CHANLIMIT= CHANTYPES=#! CHATHISTORY=1000 MAXTARGETS=1 PREFIX= TARGMAX=JOIN:1,PART:1 UTF8ONLY :are supported by this server\r\n"
 
   setup do
     start_supervised!({MockMatrixClient, {self()}})