Set timeouts from CancellationTimeout. Fixes #951

Author: bgrainger

src/MySqlConnector/Core/ServerSession.cs

@@ -125,7 +125,6 @@ public void DoCancel(ICancellableCommand commandToCancel, MySqlCommand killComma
 				// command would be killed (because "KILL QUERY" specifies the connection whose command should be killed, not
 				// a unique identifier of the command itself). As a mitigation, we set the CommandTimeout to a low value to avoid
 				// blocking the other thread for an extended duration.
-				killCommand.CommandTimeout = 3;
 				killCommand.ExecuteNonQuery();
 			}
 		}

src/MySqlConnector/MySqlConnection.cs

@@ -706,11 +706,13 @@ internal void Cancel(ICancellableCommand command)
 				csb.Pooling = false;
 				if (m_session.IPAddress is not null)
 					csb.Server = m_session.IPAddress.ToString();
-				csb.ConnectionTimeout = 3u;
+				var cancellationTimeout = GetConnectionSettings().CancellationTimeout;
+				csb.ConnectionTimeout = cancellationTimeout < 1 ? 3u : (uint) cancellationTimeout;
 
 				using var connection = new MySqlConnection(csb.ConnectionString);
 				connection.Open();
 				using var killCommand = new MySqlCommand("KILL QUERY {0}".FormatInvariant(command.Connection!.ServerThread), connection);
+				killCommand.CommandTimeout = cancellationTimeout < 1 ? 3 : cancellationTimeout;
 				m_session.DoCancel(command, killCommand);
 			}
 			catch (MySqlException ex)