Zabbix

...G...... [DEV-4689] removed redundant dependencies on libzbxexec.a, libzbxthreads.a, libalias.a and libzbxcrypto.a from Zabbix agent 2

* commit '91d47acbc4c6bb61d588b7f7de0caa3599d6d909':
  .......... [DEV-4689] fixed tests compilation
  ...G...... [DEV-4689] removed redundant library compilation during agent2 build
  ...G...... [DEV-4689] fixed unused functions and variables
  ...G...... [DEV-4689] fixed iwyu
  ...G...... [DEV-4689] removed redundant dependency on libzbxcrypto.a
  ...G...... [DEV-4689] removed redundant includes in cgo
  ...G...... [DEV-4689] removed redundant dependency on libalias.a
  ...G...... [DEV-4689] removed redundant dependency on libzbxthreads.a
  ...G...... [DEV-4689] removed redundant dependency on libzbxexec.a, removed reduntant function declarations in cgo