SASL stall fix broke arbitrary capability requests

[A-UNDERSCORE-D]

ca8c401 sets the requested capabilities to nil on enter, thus overwriting any and all user requested capabilities.

[fzwoch]

Can confirm. Tested with Twitch's "Tags" capability.

[fzwoch]

That's still true with latest release.

This workaround works for me, but not sure that the correct approach is, or why the flags get reset?

diff --git a/irc.go b/irc.go
index a02b2b7..5e3dc10 100644
--- a/irc.go
+++ b/irc.go
@@ -510,7 +510,6 @@ func (irc *Connection) Connect(server string) error {
 
 // Negotiate IRCv3 capabilities
 func (irc *Connection) negotiateCaps() error {
-       irc.RequestCaps = nil
        irc.AcknowledgedCaps = nil
 
        var negotiationCallbacks []CallbackID