mysql56-{client, server}: Update port to 5.6.40

This update includes fixes for multiple CVEs including:
    CVE-2018-2755 in replication component, MySQL protocol
    CVE-2018-2805 in GIS extention
    CVE-2018-2782 in InnoDB
    and more info on http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html#AppendixMSQL

databases/mysql56-client/Makefile

@@ -2,6 +2,7 @@
 # $FreeBSD$
 
 PORTNAME=	mysql
+PORTREVISION=	0
 PKGNAMESUFFIX=	56-client
 
 COMMENT=	Multithreaded SQL database (client)

databases/mysql56-server/Makefile

@@ -2,8 +2,8 @@
 # $FreeBSD$
 
 PORTNAME?=	mysql
-PORTVERSION=	5.6.39
-PORTREVISION?=	3
+PORTVERSION=	5.6.40
+PORTREVISION?=	0
 CATEGORIES=	databases ipv6
 MASTER_SITES=	MYSQL/MySQL-5.6
 PKGNAMESUFFIX?=	56-server

databases/mysql56-server/pkg-plist

@@ -62,7 +62,6 @@ man/man1/mysqld_safe.1.gz
 man/man1/mysqldumpslow.1.gz
 man/man1/mysqlhotcopy.1.gz
 man/man1/mysqlman.1.gz
-man/man1/mysqltest.1.gz
 man/man1/perror.1.gz
 man/man1/replace.1.gz
 man/man1/resolve_stack_dump.1.gz