Zabbix

.......PS. [ZBXNEXT-5734] added base64 encode, decode functions to webhook

* commit '186dbf9620e104edd2dc7d09bb8d653e1a3081c5':
  .......PS. [ZBXNEXT-5734] added ChangeLog entry
  .......PS. [ZBXNEXT-5734] fixed function comment
  .......PS. [ZBXNEXT-5734] swapped function names
  .......PS. [ZBXNEXT-5734] removed cesu8 to utf8 conversion
  .......PS. [ZBXNEXT-5734] fixed function description
  .......PS. [ZBXNEXT-5734] added error handling for broken cesu8 string
  .......PS. [ZBXNEXT-5734] added error handling
  .......PS. [ZBXNEXT-5734] checked for broken cesu8 string
  .......PS. [ZBXNEXT-5734] removed redundant pop functions
  .......PS. [ZBXNEXT-5734] swapped function names
  .......PS. [ZBXNEXT-5734] moved Zabbix.BaseXXX methods to global atob/btoa functions
  .......PS. [ZBXNEXT-5734] changed code style
  .......PS. [ZBXNEXT-5734] added cesu8 to utf8 conversion
  .......PS. [ZBXNEXT-5734] add base64 encode, decode functions to webhook