Zabbix

.......PS. [ZBX-27200] fixed invalid statuses for hosts and services during network discovery when host is found on several IP addresses

Merge in ZBX/zabbix from feature/ZBX-27200-7.0 to release/7.0

* commit '2c360a2013401a8d2db3808f352beff6460d1257': (23 commits)
  ........S. [ZBX-27200] removed future version mention from version check
  ........S. [ZBX-27200] returned old host status determination for results from proxies before 7.0.26
  ........S. [ZBX-27200] reverted fix for nearestindex for empty vector
  ........S. [ZBX-27200] fixed work with nearestindex for empty vector
  ........S. [ZBX-27200] switched to binary search, moved more operations out of RDLOCK_CACHE, fixed uniq check
  ........S. [ZBX-27200] reduced time spent under RDLOCK_CACHE
  ........S. [ZBX-27200] updated log subsystem to be compatible with threads
  ........S. [ZBX-27200] fixed memory issues
  ........S. [ZBX-27200] fixed condition
  .......... [ZBX-27200] updated function headers
  ........S. [ZBX-27200] fixed memory leak and updated discovery_update_hosts cb
  ........S. [ZBX-27200] removed unnecessary changes
  ........S. [ZBX-27200] fixed add_discovered_host when host is down
  ........S. [ZBX-27200] reworked host status update using last ip
  ........S. [ZBX-27200] fixed crash
  ........S. [ZBX-27200] fixed issues form reviews
  ........S. [ZBX-27200] fixed memory leack
  ........S. [ZBX-27200] fixed style issues
  .......PS. [ZBX-27200] fixed code style issues, improved comments, added minor code tweaks
  .......PS. [ZBX-27200] fixed proxy compilation and code style issue
  ...