Hi!

IRC links in ox-html are currently broken. There exists a special 'irc'
content handler on the web, telling browsers to open an irc link in an
external irc client. The format for such links seems identical to org
(irc:irc.freenode.net/user).

Previously links such as:

[[irc:irc.freenode.net/test][Irc link]]

Would export to 

<a href="irc.freenode.net/test">Irc link</a>

in ox-html.

After this tiny patch, it exports to:

<a href="irc:irc.freenode.net/test">Irc link</a>

which tells browsers such as firefox to open links in irc clients.

Let me know if you find any issues!

-Jay

>From fa1a5ad3bf63158775ffa8ab3de37fb056103ab4 Mon Sep 17 00:00:00 2001
From: Jay Kamat <jaygka...@gmail.com>
Date: Sun, 24 Sep 2017 01:11:42 -0400
Subject: [PATCH] ox-html.el: Fix irc links exporting to link to local files

* lisp/ox-html.el: Add "irc" to special link types which are exported
  as their link type and path separated by ':', so that browser irc
  content handlers work properly.
---
 lisp/ox-html.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index d91ca73622..8756cda7e5 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -2973,7 +2973,7 @@ INFO is a plist holding contextual information.  See
 	 (desc (org-string-nw-p desc))
 	 (path
 	  (cond
-	   ((member type '("http" "https" "ftp" "mailto" "news"))
+	   ((member type '("http" "https" "ftp" "mailto" "news" "irc"))
 	    (url-encode-url (org-link-unescape (concat type ":" raw-path))))
 	   ((string= type "file")
 	    ;; Treat links to ".org" files as ".html", if needed.
-- 
2.11.0

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