[slack] giphy integration does not display on IRC

[mlsimpson]

User posts a /giphy post, which is displayed in web/ios app. However, IRC user does not see it.

Debug output:

time="2018-03-18T02:08:00Z" level=debug msg="handleSlackActionPost() receiving msg &slack.MessageEvent{Msg:slack.Msg{Type:\"message\", Channel:\"C9E2TAZ43\", User:\"U9E2TAV99\", Text:\"\", Timestamp:\"1521338880.000045\", ThreadTimestamp:\"\", IsStarred:false, PinnedTo:[]string(nil), Attachments:[]slack.Attachment{slack.Attachment{Color:\"\", Fallback:\"giphy: https://giphy.com/gifs/104-eChTvaHdhqWE8\", CallbackID:\"\", ID:1, AuthorName:\"\", AuthorSubname:\"\", AuthorLink:\"\", AuthorIcon:\"\", Title:\"irc\", TitleLink:\"https://giphy.com/gifs/104-eChTvaHdhqWE8\", Pretext:\"\", Text:\"\", ImageURL:\"https://media0.giphy.com/media/eChTvaHdhqWE8/giphy-downsized.gif\", ThumbURL:\"\", Fields:[]slack.AttachmentField(nil), Actions:[]slack.AttachmentAction(nil), MarkdownIn:[]string(nil), Footer:\"Posted using /giphy\", FooterIcon:\"\", Ts:\"\"}}, Edited:(*slack.Edited)(nil), LastRead:\"\", Subscribed:false, UnreadCount:0, SubType:\"\", Hidden:false, DeletedTimestamp:\"\", EventTimestamp:\"1521338880.000045\", BotID:\"B9FE7ECF8\", Username:\"\", Icons:(*slack.Icon)(nil), Inviter:\"\", Topic:\"\", Purpose:\"\", Name:\"\", OldName:\"\", Members:[]string(nil), ReplyCount:0, Replies:[]slack.Reply(nil), ParentUserId:\"\", File:(*slack.File)(nil), Upload:false, Comment:(*slack.Comment)(nil), ItemType:\"\", ReplyTo:0, Team:\"T9E531LS0\", Reactions:[]slack.ItemReaction(nil), ResponseType:\"\", ReplaceOriginal:false, DeleteOriginal:false}, SubMessage:(*slack.Msg)(nil)}" module=matterircd
time="2018-03-18T02:08:00Z" level=debug msg="handleSlackActionPost() receiving msg &slack.MessageEvent{Msg:slack.Msg{Type:\"message\", Channel:\"C9E2TAZ43\", User:\"\", Text:\"\", Timestamp:\"1521338877.000023\", ThreadTimestamp:\"\", IsStarred:false, PinnedTo:[]string(nil), Attachments:[]slack.Attachment(nil), Edited:(*slack.Edited)(nil), LastRead:\"\", Subscribed:false, UnreadCount:0, SubType:\"message_deleted\", Hidden:true, DeletedTimestamp:\"1521338877.000023\", EventTimestamp:\"1521338880.000055\", BotID:\"\", Username:\"\", Icons:(*slack.Icon)(nil), Inviter:\"\", Topic:\"\", Purpose:\"\", Name:\"\", OldName:\"\", Members:[]string(nil), ReplyCount:0, Replies:[]slack.Reply(nil), ParentUserId:\"\", File:(*slack.File)(nil), Upload:false, Comment:(*slack.Comment)(nil), ItemType:\"\", ReplyTo:0, Team:\"\", Reactions:[]slack.ItemReaction(nil), ResponseType:\"\", ReplaceOriginal:false, DeleteOriginal:false}, SubMessage:(*slack.Msg)(nil)}" module=matterircd

[mlsimpson]

You rule, @42wim!