Class: TMMConnection
function TestConnection(out AServerVersion: string; out AMsg: string): Boolean;Opens a MySQL/MariaDB connection and verifies credentials.
AServerVersion receives the server version string on
success.
AMsg receives the error description on failure.
Timeout: HTTP_TIMEOUT_DEFAULT
(overridden by TimeoutMs
when non-zero).
On success, server limits are populated automatically,
ConnectionTested is set to True, and the
schema browser properties (MySQLDatabase,
TableNames, DatabaseStructure) are populated
from the server.