MSSQL

...G...... [ZBXNEXT-6235] add Database session parameter

* commit '6ed74af82c97e88330c6ee39ecf0cd01686fa287':
  ...G...... [ZBXNEXT-6235] update readme *.db.get related key descriptions.
  ...G...... [ZBXNEXT-6235] add Database session parameter

(cherry picked from commit ea7ef8fe3f1622515c3ce4d69ce0109d3344c647)