net-im/libstrophe: Use upstream release archive and improve port

- Use upstream release archive as recommended in USE_GITHUB section
  in Porters Handbook
- Add option to use libxml2
- Rearrange Makefile to follow Porters Handbook more closely

PR:		266429
Reviewed by:	ashish (maintainer)

net-im/libstrophe/Makefile

@@ -1,6 +1,7 @@
 PORTNAME=	libstrophe
-PORTVERSION=	0.12.2
+DISTVERSION=	0.12.2
 CATEGORIES=	net-im
+MASTER_SITES=	https://github.com/strophe/${PORTNAME}/releases/download/${DISTVERSION}/
 
 MAINTAINER=	ashish@FreeBSD.org
 COMMENT=	Lightweight XMPP library
@@ -9,14 +10,22 @@ WWW=		https://strophe.im/libstrophe/
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/MIT-LICENSE.txt
 
-LIB_DEPENDS=	libexpat.so:textproc/expat2
-
-USES=		gmake libtool pkgconfig autoreconf ssl
-USE_GITHUB=	yes
-GH_ACCOUNT=	strophe
+USES=		gmake libtool pkgconfig ssl tar:xz
 GNU_CONFIGURE=	yes
-CONFIGURE_ARGS+=	--with-pkgconfigdir=${PREFIX}/libdata/pkgconfig
 USE_LDCONFIG=	yes
-INSTALL_TARGET=install-strip
+
+INSTALL_TARGET=	install-strip
+
+CONFIGURE_ARGS=	--with-pkgconfigdir=${PREFIX}/libdata/pkgconfig
+
+OPTIONS_DEFAULT=	EXPAT
+OPTIONS_SINGLE=	XML
+OPTIONS_SINGLE_XML=	EXPAT LIBXML2
+
+EXPAT_LIB_DEPENDS=	libexpat.so:textproc/expat2
+
+LIBXML2_USE=		GNOME=libxml2
+LIBXML2_USES=		gnome
+LIBXML2_CONFIGURE_WITH=	libxml2
 
 .include <bsd.port.mk>

net-im/libstrophe/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1663179147
-SHA256 (strophe-libstrophe-0.12.2_GH0.tar.gz) = 049232e3968ad65c65e08601cb3de171d3a25d154b6f14332c35a7bf961e2c9d
-SIZE (strophe-libstrophe-0.12.2_GH0.tar.gz) = 218820
+TIMESTAMP = 1663271388
+SHA256 (libstrophe-0.12.2.tar.xz) = b3c79b6deeafafc0f622ba3ee3ca67e9a8e7d75edb102588c6b6f52b38c9fa4b
+SIZE (libstrophe-0.12.2.tar.xz) = 400092