Zabbix

...G...... [ZBXNEXT-6306] added native linux support for key vm.memory.size in Zabbix agent 2

* commit 'ea9d64080729f8dcd21015e14612de9093bb4ff2':
  .......... [ZBXNEXT-6306] added change log
  ...G...... [ZBXNEXT-6306] improved EINTR handling
  .......... [ZBXNEXT-6306] changed return and internal parsing type to uint64 and added EINTR err check
  ...G...... [ZBXNEXT-6306] added a missing error check and code clean up
  ...G...... [ZBXNEXT-6306] code clean up
  ...G...... [ZBXNEXT-6306] code clean up
  ...G...... [ZBXNEXT-6306] implemented native linux support for key vm.memory.size in Zabbix agent 2

(cherry picked from commit c86a6edf7ad7d3404b672114c49963f131680024)