MSSQL

...G...... [ZBXNEXT-9508] added custom query enable parameter and path default

* commit 'f74b94d5b96ab57d2cffeab023f8d6f51cb66a22':
  ...G...... [ZBXNEXT-9508] fixed a typo
  ...G...... [ZBXNEXT-9508] fixed unit tests and code clean up
  ...G...... [ZBXNEXT-9508] fix PR comments
  ...G...... [ZBXNEXT-9508] updated readme
  ...G...... [ZBXNEXT-9508] updated makefile
  ...G...... [ZBXNEXT-9508] fixed custom path for windows
  .......... [ZBXNEXT-9508] code clean up and added unit tests
  .......... [ZBXNEXT-9508] added changelog
  ...G...... [ZBXNEXT-9508] added custom query path to mysql and oracle plugins for Zabbix agent 2