Zabbix

.......PS. [ZBXNEXT-6167] added diaginfo runtime command to log internal diagnostic information

* commit 'b9d85eedee7431f9204ac3a00eea559b81486ae7': (45 commits)
  .D........ [ZBXNEXT-6167] updated server and proxy man pages
  .D........ [ZBXNEXT-6167] added changelog entry
  .......PS. [ZBXNEXT-6167] don't allow runtime command on Zabbix agentd
  .......PS. [ZBXNEXT-6167] style fix
  .......PS. [ZBXNEXT-6167] style fix
  .......PS. [ZBXNEXT-6167] simplified main process waiting for dead children
  .......PS. [ZBXNEXT-6167] added missing include file, more defines
  .......PS. [ZBXNEXT-6167] added diaginfo remote command suppor to proxy
  .......PS. [ZBXNEXT-6167] added comments, minor refactoring
  ........S. [ZBXNEXT-6167] added remote command support for diaginfo printing on server
  .......PS. [ZBXNEXT-6167] small style fixes
  ........S. [ZBXNEXT-6167] fixed value cache diagnostics retrieval with disabled value cache
  .......PS. [ZBXNEXT-6167] fixed vector not being destroyed on failure
  .......PS. [ZBXNEXT-6167] fixed vector not being destroyed on failure
  .......PS. [ZBXNEXT-6167] fixed warning
  .......PS. [ZBXNEXT-6167] fixed memory leak
  ........S. [ZBXNEXT-6167] fixed memory leak
  ........S. [ZBXNEXT-6167] fixed wrong type used when serializing lld top result
  ........S. [ZBXNEXT-6167] small style fix
  ........S. [ZBXNEXT-6167] small style fixes
  ...

(cherry picked from commit dabac74c51a9d19db24c871f7f8ec247ac540eeb)