* move user/group creation from postinst to initscript
* use /var/run/zabbix directory for pid file
* use /var/log/zabbix directory for log file
* set correct ownership and perms for both directories
git-svn-id: svn://svn.openwrt.org/openwrt/packages@28892 3c298f89-4303-0410-b956-a3cf2f4a3e73