.......... [ZBXNEXT-826] updated release version [2.4.3rc1]; updated API version [2.4.3]

git-svn-id: svn://svn.zabbix.com/trunk@50421 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2
..F....... [ZBX-8983] fixed "schema" option description in frontend configuration file

git-svn-id: svn://svn.zabbix.com/trunk@50424 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2