Update chat/irssi-xmpp to 0.53

pkgsrc changes:
 - Drop MAINTAINERship
 - Update distinfo for irssi-0.8.19

Changes:
0.53 - 18/03/2016
 - Irssi 0.8.18 support
 - Bug fixes and stability improvements

Index: Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/chat/irssi-xmpp/Makefile,v
retrieving revision 1.5
diff -u -p -r1.5 Makefile
--- Makefile	7 Jun 2014 23:49:47 -0000	1.5
+++ Makefile	14 Aug 2016 21:02:41 -0000
@@ -1,12 +1,12 @@
 # $NetBSD: Makefile,v 1.5 2014/06/07 23:49:47 ryoon Exp $
 #
 
-DISTNAME=	irssi-xmpp-0.52
+DISTNAME=	irssi-xmpp-0.53
 CATEGORIES=	chat
 MASTER_SITES=	http://cybione.org/~irssi-xmpp/files/
 DISTFILES=	${DISTNAME}.tar.gz ${IRSSI_DISTFILE}
 
-MAINTAINER=	leot1990@users.sourceforge.net
+MAINTAINER=	pkgsrc-users@NetBSD.org
 HOMEPAGE=	http://cybione.org/~irssi-xmpp/
 COMMENT=	Irssi plugin to connect to the Jabber network
 LICENSE=	gnu-gpl-v2
Index: PLIST
===================================================================
RCS file: /cvsroot/pkgsrc/chat/irssi-xmpp/PLIST,v
retrieving revision 1.1
diff -u -p -r1.1 PLIST
--- PLIST	26 Aug 2012 14:06:19 -0000	1.1
+++ PLIST	14 Aug 2016 21:02:41 -0000
@@ -7,6 +7,7 @@ share/doc/irssi/irssi-xmpp/GENERAL
 share/doc/irssi/irssi-xmpp/MUC
 share/doc/irssi/irssi-xmpp/STARTUP
 share/doc/irssi/irssi-xmpp/XEP
+share/irssi/help/presence
 share/irssi/help/roster
 share/irssi/help/xmppconnect
 share/irssi/help/xmppserver
Index: distinfo
===================================================================
RCS file: /cvsroot/pkgsrc/chat/irssi-xmpp/distinfo,v
retrieving revision 1.4
diff -u -p -r1.4 distinfo
--- distinfo	3 Nov 2015 01:20:20 -0000	1.4
+++ distinfo	14 Aug 2016 21:02:41 -0000
@@ -1,10 +1,10 @@
 $NetBSD: distinfo,v 1.4 2015/11/03 01:20:20 agc Exp $
 
-SHA1 (irssi-0.8.17.tar.bz2) = 3bdee9a1c1f3e99673143c275d2c40275136664a
-RMD160 (irssi-0.8.17.tar.bz2) = 0ee6f41a4725c8498030d2c524e202df78a2aff6
-SHA512 (irssi-0.8.17.tar.bz2) = e3d9b130c46e6977400f5a75374cf3e32d5a6e6907b2fd4c920463b5413575708b094c9fa38151997a120ce581de26092424296510ca93b3eee7b0844be45953
-Size (irssi-0.8.17.tar.bz2) = 1102196 bytes
-SHA1 (irssi-xmpp-0.52.tar.gz) = 330d80e6deb115b875d2a4e1ad0841888285e378
-RMD160 (irssi-xmpp-0.52.tar.gz) = b007e0462fee3a24dc06296713e4fc912b8c2528
-SHA512 (irssi-xmpp-0.52.tar.gz) = 27f7b877d02e0812b59e9f23ee12e58b842e3923ab5f0aa8cdf874dc9b30d9d22dbae9ef848ee5ffe2dcb667a0344f960125a3ffc072ce065e1fdf714eb98b27
-Size (irssi-xmpp-0.52.tar.gz) = 68105 bytes
+SHA1 (irssi-0.8.19.tar.gz) = a457a7141e700c9fffe9fe744f2343917113d1a1
+RMD160 (irssi-0.8.19.tar.gz) = 74e75311e346a6840793fca6c16c035f81730b77
+SHA512 (irssi-0.8.19.tar.gz) = 9ae240b71a542b8eee8093f97aa8da88078e89f901d666f6c084cd3de9965ec276934097d9a12bf3888fb7134628b4b21358b6ae40e158b839f73d3b934310b4
+Size (irssi-0.8.19.tar.gz) = 1565074 bytes
+SHA1 (irssi-xmpp-0.53.tar.gz) = 57d993bbebc30c72b500e2c4b4c4e79c15d8b6f9
+RMD160 (irssi-xmpp-0.53.tar.gz) = ed65af7220834f7fb6701612e81c6a523f730b06
+SHA512 (irssi-xmpp-0.53.tar.gz) = 09969db01b77e95248a080599d480b8271dcbe6d42bc90e5e2bb304a2d1b9695b70090ef0a6b7342bf6e17326e0f7a50c11c85e02e6ed742ec55820ffad655be
+Size (irssi-xmpp-0.53.tar.gz) = 65649 bytes