Zabbix

.........T [ZBX-18658] changed {$AMI.PORT} macro value to 5038, added handling the "Follows" response and situations with unloaded modules

Merge in ZBX/zabbix from feature/ZBX-18658-5.0 to release/5.0

* commit 'e1c4c57244041cfa87525f325fe0a1ee5d39dabe':
  .........T [ZBX-18658] fixed JS code typos
  .........T [ZBX-18658] fixed JS code stylistic mistakes
  .........T [ZBX-18658] added Logoff error handling
  .........T [ZBX-18658] added "IAX online peers" and "PJSIP available endpoints" items with the graphs, fixed typos
  .........T [ZBX-18658] README.md edited
  .........T [ZBX-18658] changed template description
  .........T [ZBX-18658] changed {$AMI.PORT} macro value to 5038, added handling the "Follows" response and situations with unloaded modules