Add TiFlash security configuration (#5094)
Add TiFlash security configuration (#5094)

* Add configuration

Signed-off-by: JaySon-Huang <2f08f09fb8e8b06aa9c8361f55804ff93a387dca@qq.com>

* Apply suggestions from code review

* Apply suggestions from code review

Co-authored-by: Flowyi <7f783fd4ae26d7e51607d9ebb45a8dc9a8eabe04@gmail.com>

* Apply suggestions from code review

Co-authored-by: TomShawn <3d0966147538bc5ab020e8dffa2c0b746f9728a6@users.noreply.github.com>

Co-authored-by: TomShawn <3d0966147538bc5ab020e8dffa2c0b746f9728a6@users.noreply.github.com>
Co-authored-by: Flowyi <7f783fd4ae26d7e51607d9ebb45a8dc9a8eabe04@gmail.com>
pingcap/docs-cn,pingcap/docs-cn