Zabbix

.......PS. [ZBXNEXT-7759] added array and Buffer support to javascript btoa function and HttpRequest post/put methods

Merge in ZBX/zabbix from feature/ZBXNEXT-7759-6.0 to release/6.0

* commit 'd321e98130f5e5fc601097eec05993df82f69d0a':
  .......PS. [ZBXNEXT-7759] added check for empty/none/null values when extracting function parameters
  .......PS. [ZBXNEXT-7759] fixed javascript httprequest content type autodetection memory access error with buffer/object parameter type
  .......PS. [ZBXNEXT-7759] added check for null terminated string when trying to autodetect content type
  .......... [ZBXNEXT-7759] support convertation to string for non array/buffer/string btoa, hmac, httprequest, md5, sha256 function parameters
  .D........ [ZBXNEXT-7759] added changelog entry
  .......PS. [ZBXNEXT-7759] add support for arrays and Buffer to javascript HttpRequest post/put methods
  .......PS. [ZBXNEXT-7759] fixed javascript btoa function not supporting nulls within the string

(cherry picked from commit d83d82019e0ffff2bc148b4a4dc8e3ccc20250be)