Improvements and changes

update year in copyright notice
get rid of custom function get_param: definition and calls
get the scripts ready for automation. In controlled LXD environments, the deployment of the scripts and their requirements can be automated. See https://git.rcasys.com/pmarini/ncs-automation/tree/master/nextcloud/monitor_setup

Changelog

update year in copyright notice 93ca708
get rid of custom function get_param 195c910
get rid of custom function get_param 144db65
transform port to INT e69d4ed
get rid of get_param custom function c014661
rename REDIS_PASSWORD -> REDIS_PWD 7c75e49
rename some variables 0609c52
get rid of redundant parameter nc_host e33626b
rename folder to zabbix_agentd.d & prepare Redis configuration file for automated setup 80b0940