A.F....... [ZBX-1357] updated Polish and Russian translations; thanks to Zabbix translators

git-svn-id: svn://svn.zabbix.com/trunk@48935 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2
.D........ [ZBX-1357] add changelog entry

git-svn-id: svn://svn.zabbix.com/trunk@48936 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2