Zabbix

...G...PS. [ZBX-20228] improved error reporting when SSL_write() or SSL_read() functions fail, removed redundant code that resulted in timeout on windows

Merge in ZBX/zabbix from feature/ZBX-20228-5.0-2 to release/5.0

* commit '5790871ba0584dddceb07b5383c8610ffb72533c':
  ...G...... [ZBX-20228] improved error message in case of unsuccessful tls read or write
  ...G...... [ZBX-20228] improved error message in case of unsuccessful tls read or write
  .D........ [ZBX-20228] added Changelog entry
  .D........ [ZBX-20228] added Changelog entry
  ...G...... [ZBX-20228] improved error message in case of unsuccessful tls read or write
  ...G...... [ZBX-20228] improved error message in case of unsuccessful tls read or write
  ...G...... [ZBX-20228] removed redundant code
  ...G...... [ZBX-20228] reverted previous change
  ...G...... [ZBX-20228] wrapped tls read and write functions
  ...G...... [ZBX-20228] wrapped tls read and write functions