Index: head/comms/libmodbus/Makefile
===================================================================
--- head/comms/libmodbus/Makefile	(revision 530872)
+++ head/comms/libmodbus/Makefile	(revision 530873)
@@ -1,24 +1,25 @@
 # $FreeBSD$
 
 PORTNAME=	libmodbus
 PORTVERSION=	3.1.6
+PORTREVISION=	1
 CATEGORIES=	comms
-MASTER_SITES=	http://libmodbus.org/site_media/build/
+MASTER_SITES=	https://libmodbus.org/releases/
 
 MAINTAINER=	bsam@FreeBSD.org
 COMMENT=	Modbus library
 
 LICENSE=	LGPL21+
 LICENSE_FILE=	${WRKSRC}/COPYING.LESSER
 
 BUILD_DEPENDS=	a2x:textproc/asciidoc \
 		xmlto:textproc/xmlto
 
+USES=		gmake libtool pathfix
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
-USES=		gmake libtool pathfix
 INSTALL_TARGET=	install-strip
 
 OPTIONS_DEFINE=	DOCS
 
 .include <bsd.port.mk>
Index: head/comms/libmodbus/pkg-descr
===================================================================
--- head/comms/libmodbus/pkg-descr	(revision 530872)
+++ head/comms/libmodbus/pkg-descr	(revision 530873)
@@ -1,5 +1,5 @@
 Libmodbus is a C library designed to provide a fast and robust
 implementation of the Modbus protocol. It runs on Linux, Mac OS X,
 FreeBSD, QNX and Windows.
 
-WWW: http://libmodbus.org/
+WWW: https://libmodbus.org/
Index: head/comms/libmodbus/pkg-plist
===================================================================
--- head/comms/libmodbus/pkg-plist	(revision 530872)
+++ head/comms/libmodbus/pkg-plist	(revision 530873)
@@ -1,72 +1,73 @@
 include/modbus/modbus-rtu.h
 include/modbus/modbus-tcp.h
 include/modbus/modbus-version.h
 include/modbus/modbus.h
 lib/libmodbus.so
 lib/libmodbus.so.5
 lib/libmodbus.so.5.1.0
 libdata/pkgconfig/libmodbus.pc
 man/man3/modbus_close.3.gz
 man/man3/modbus_connect.3.gz
 man/man3/modbus_flush.3.gz
 man/man3/modbus_free.3.gz
 man/man3/modbus_get_byte_from_bits.3.gz
 man/man3/modbus_get_byte_timeout.3.gz
 man/man3/modbus_get_float.3.gz
 man/man3/modbus_get_float_abcd.3.gz
 man/man3/modbus_get_float_badc.3.gz
 man/man3/modbus_get_float_cdab.3.gz
 man/man3/modbus_get_float_dcba.3.gz
 man/man3/modbus_get_header_length.3.gz
 man/man3/modbus_get_response_timeout.3.gz
+man/man3/modbus_get_slave.3.gz
 man/man3/modbus_get_socket.3.gz
 man/man3/modbus_mapping_free.3.gz
 man/man3/modbus_mapping_new.3.gz
 man/man3/modbus_mapping_new_start_address.3.gz
 man/man3/modbus_mask_write_register.3.gz
 man/man3/modbus_new_rtu.3.gz
 man/man3/modbus_new_tcp.3.gz
 man/man3/modbus_new_tcp_pi.3.gz
 man/man3/modbus_read_bits.3.gz
 man/man3/modbus_read_input_bits.3.gz
 man/man3/modbus_read_input_registers.3.gz
 man/man3/modbus_read_registers.3.gz
 man/man3/modbus_receive.3.gz
 man/man3/modbus_receive_confirmation.3.gz
 man/man3/modbus_reply.3.gz
 man/man3/modbus_reply_exception.3.gz
 man/man3/modbus_report_slave_id.3.gz
 man/man3/modbus_rtu_get_rts.3.gz
 man/man3/modbus_rtu_get_rts_delay.3.gz
 man/man3/modbus_rtu_get_serial_mode.3.gz
 man/man3/modbus_rtu_set_custom_rts.3.gz
 man/man3/modbus_rtu_set_rts.3.gz
 man/man3/modbus_rtu_set_rts_delay.3.gz
 man/man3/modbus_rtu_set_serial_mode.3.gz
 man/man3/modbus_send_raw_request.3.gz
 man/man3/modbus_set_bits_from_byte.3.gz
 man/man3/modbus_set_bits_from_bytes.3.gz
 man/man3/modbus_set_byte_timeout.3.gz
 man/man3/modbus_set_debug.3.gz
 man/man3/modbus_set_error_recovery.3.gz
 man/man3/modbus_set_float.3.gz
 man/man3/modbus_set_float_abcd.3.gz
 man/man3/modbus_set_float_badc.3.gz
 man/man3/modbus_set_float_cdab.3.gz
 man/man3/modbus_set_float_dcba.3.gz
 man/man3/modbus_set_response_timeout.3.gz
 man/man3/modbus_set_slave.3.gz
 man/man3/modbus_set_socket.3.gz
 man/man3/modbus_strerror.3.gz
 man/man3/modbus_tcp_accept.3.gz
 man/man3/modbus_tcp_listen.3.gz
 man/man3/modbus_tcp_pi_accept.3.gz
 man/man3/modbus_tcp_pi_listen.3.gz
 man/man3/modbus_write_and_read_registers.3.gz
 man/man3/modbus_write_bit.3.gz
 man/man3/modbus_write_bits.3.gz
 man/man3/modbus_write_register.3.gz
 man/man3/modbus_write_registers.3.gz
 man/man7/libmodbus.7.gz
 %%PORTDOCS%%%%DOCSDIR%%/MIGRATION
 %%PORTDOCS%%%%DOCSDIR%%/README.md