bug#29657: rcirc does not retain the server alias on reconnect

[Miciah Dashiel Butler Masters <miciah.masters@gmail.com>]

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rcirc does not retain the server alias on reconnect.  As a result, rcirc
fails to re-use server and channel buffers when an alias is used.  Further
problems may ensue when aliases are used to differentiate multiple
connections to the same host, for example when using a single IRC bouncer
or proxy to connect to multiple IRC networks.

The attached patch modifies rcirc to save the server alias when connecting
to a server so that reconnect will retain the alias.

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From 64d286fb94c29cbda684741ae77f11c0734803ab Mon Sep 17 00:00:00 2001
From: Miciah Masters <miciah.masters@gmail.com>
Date: Sun, 10 Dec 2017 20:14:09 -0500
Subject: [PATCH] Save the server alias on reconnect

rcirc does not retain the server alias on reconnect.  As a result, rcirc
fails to re-use server and channel buffers when an alias is used.  Further
problems may ensue when aliases are used to differentiate multiple
connections to the same host, for example when using a single IRC bouncer
or proxy to connect to multiple IRC networks.

Save the server alias when connecting to a server so that reconnect will
retain the alias.
* lisp/net/rcirc.el (rcirc-connect): Include server-alias when setting
  rcirc-connection-info.
---
 lisp/net/rcirc.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/net/rcirc.el b/lisp/net/rcirc.el
index 3b6b6c8c80..2dd80f49a6 100644
--- a/lisp/net/rcirc.el
+++ b/lisp/net/rcirc.el
@@ -585,7 +585,7 @@ rcirc-connect
 
       (setq-local rcirc-connection-info
 		  (list server port nick user-name full-name startup-channels
-			password encryption))
+			password encryption server-alias))
       (setq-local rcirc-process process)
       (setq-local rcirc-server server)
       (setq-local rcirc-server-name
-- 
2.11.0.258.ge05806d