Zabbix

A.F....PS. [ZBXNEXT-9805] added OAuth support for email media type

Merge in ZBX/zabbix from feature/ZBXNEXT-9805-7.3 to master

* commit 'a62786ada1eaee827b6d2eca9b08254b9f186b8d': (119 commits)
  .......... [ZBXNEXT-9805] added changelog file
  A.F....... [ZBXNEXT-9805] changed url to string validation for oauth url fields in api; removed frontend validation for url to be in same style as api
  .......PS. [ZBXNEXT-9805] added missing preprocessing macros
  .......PS. [ZBXNEXT-9805] fixed style issues
  .......PS. [ZBXNEXT-9805] added debug information on failed email sending
  .......PS. [ZBXNEXT-9805] added debug information on failed email sending
  .......PS. [ZBXNEXT-9805] added debug information on failed email sending
  A......... [ZBXNEXT-9805] fixed coding style
  A......... [ZBXNEXT-9805] added access_token_updated for update of access_token when access_token_updated is not set; simplified code for readability
  .......PS. [ZBXNEXT-9805] changed login denied error message
  A.F....... [ZBXNEXT-9805] fixed access_token_updated value may be incorrect for authorized tokens; allow set access_token_updated for userdirectory.update and userdirectory.create
  .......PS. [ZBXNEXT-9805] changed login denied error message
  .......PS. [ZBXNEXT-9805] changed login denied error message
  .......PS. [ZBXNEXT-9805] changed token statuses upon successful access token update
  .......PS. [ZBXNEXT-9805] changed token statuses upon successful access token update
  .......PS. [ZBXNEXT-9805] fixed unfreed memory in processing of email
  .......PS. [ZBXNEXT-9805] fixed unfreed memory in processing of email
  .......PS. [ZBXNEXT-9805] fixed uninitialized member in media_type structure
  ..F....... [ZBXNEXT-9805] fixed scope arguments for outlook365
  ..F....... [ZBXNEXT-9805] fixed typo in comment
  ...