documentation

Merge branch 'release/7.0' of https://git.zabbix.com/scm/web/documentation into feature/DEV-4228-7.0-D-s1s2-v2. Merge conflict RESOLVED in:
- en\manual\best_practices\security\access_control.md
- en\manual\installation\install\win_agent.md
- en\manual\installation\install\building_zabbix_agent_2_on_windows.md