Zabbix

..F.I...S. [ZBXNEXT-6921] introduced support of primary keys for history tables

* commit '33ba654171705748619281b91702bfe2ff81e3b5': (51 commits)
  ..F....... [ZBXNEXT-6921] fixed grammatical error
  ..F....... [ZBXNEXT-6921] grouped test dependencies; added change-log entry
  ..F....... [ZBXNEXT-6921] fixed test dependency; fixed incorrect argument passed
  ..F....... [ZBXNEXT-6921] fixed test dependency
  .......... [ZBXNEXT-6921] fixed int test
  ..F....... [ZBXNEXT-6921] fixed notice for when history_pk state is yet unknown
  ........S. [ZBXNEXT-6921] small style fix
  ........S. [ZBXNEXT-6921] small style fix
  ........S. [ZBXNEXT-6921] fixed PostgreSQL to check error code instead of error message
  ........S. [ZBXNEXT-6921] added log when duplicates are successfully skipped
  ........S. [ZBXNEXT-6921] small style fix
  ........S. [ZBXNEXT-6921] fixed unused variable warning
  ........S. [ZBXNEXT-6921] fixed unused variable warning
  ........S. [ZBXNEXT-6921] small style fix
  ........S. [ZBXNEXT-6921] small style fix
  ........S. [ZBXNEXT-6921] small style fix
  .......... [ZBXNEXT-6921] fixed cmocka tests
  ........S. [ZBXNEXT-6921] refactored flush code retuning
  ........S. [ZBXNEXT-6921] improved performance by sorting and using binary search
  ........S. [ZBXNEXT-6921] improved performance by sorting and using binary search
  ...