mail/libetpan: Update to 1.9.1

Changelog: https://github.com/dinhviethoa/libetpan/releases/tag/1.9           

Index: mail/libetpan/Makefile
===================================================================
--- mail/libetpan/Makefile	(revision 479841)
+++ mail/libetpan/Makefile	(working copy)
@@ -2,7 +2,7 @@
 # $FreeBSD$
 
 PORTNAME=	libetpan
-PORTVERSION=	1.8
+PORTVERSION=	1.9.1
 CATEGORIES=	mail ipv6
 
 MAINTAINER=	ports@FreeBSD.org
@@ -15,15 +15,17 @@
 		libexpat.so:textproc/expat2 \
 		libsasl2.so:security/cyrus-sasl2
 
-USE_GITHUB=	yes
-GH_ACCOUNT=	dinhviethoa
+GNU_CONFIGURE=	yes
+INSTALL_TARGET=	install-strip
 
 USES=		autoreconf gmake iconv libtool localbase
-GNU_CONFIGURE=	yes
-INSTALL_TARGET=	install-strip
 USE_LDCONFIG=	yes
+USE_GITHUB=	yes
+GH_ACCOUNT=	dinhviethoa
 
-OPTIONS_DEFINE=		IPV6
+PORTDOCS=	AUTHORS ChangeLog NEWS
+
+OPTIONS_DEFINE=		DOCS IPV6
 OPTIONS_SINGLE=		CRYPTO
 OPTIONS_SINGLE_CRYPTO=	GNUTLS OPENSSL
 OPTIONS_DEFAULT=	OPENSSL
@@ -35,10 +37,14 @@
 
 IPV6_CONFIGURE_ENABLE=	ipv6
 
-OPENSSL_CONFIGURE_ON=	--with-openssl="${OPENSSLBASE}"
+OPENSSL_CONFIGURE_WITH=	openssl="${OPENSSLBASE}"
 OPENSSL_USES=		ssl
 
 pre-configure:
 	@(cd ${WRKSRC} && ${LN} -s README.md README)
 
+do-install-DOCS-on:
+	@${MKDIR} ${STAGEDIR}${DOCSDIR}
+	${INSTALL_DATA} ${PORTDOCS:S|^|${WRKSRC}/|} ${STAGEDIR}${DOCSDIR}
+
 .include <bsd.port.mk>
Index: mail/libetpan/distinfo
===================================================================
--- mail/libetpan/distinfo	(revision 479841)
+++ mail/libetpan/distinfo	(working copy)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1494363053
-SHA256 (dinhviethoa-libetpan-1.8_GH0.tar.gz) = 4e67a7b4abadcf3cc16fa16e1621a68e54d489dadfd9a7d1f960c172e953b6eb
-SIZE (dinhviethoa-libetpan-1.8_GH0.tar.gz) = 6188927
+TIMESTAMP = 1537145990
+SHA256 (dinhviethoa-libetpan-1.9.1_GH0.tar.gz) = f5e354ccf1014c6ee313ade1009b8a82f28043d2504655e388bb4c1328700fcd
+SIZE (dinhviethoa-libetpan-1.9.1_GH0.tar.gz) = 6189971
Index: mail/libetpan/pkg-plist
===================================================================
--- mail/libetpan/pkg-plist	(revision 479841)
+++ mail/libetpan/pkg-plist	(working copy)
@@ -166,4 +166,4 @@
 lib/libetpan.a
 lib/libetpan.so
 lib/libetpan.so.20
-lib/libetpan.so.20.1.0
+lib/libetpan.so.20.2.0