Add comments for new tls transport
Add comments for new tls transport

To explain why use this to avoid replication hang forever issue

Signed-off-by: DQ <5b460793db966fe84244ff3796dd28c1ec367157@vmware.com>

wy65701436/harbor,reasonerjt/harbor,reasonerjt/harbor,reasonerjt/harbor,wy65701436/harbor,reasonerjt/harbor,wy65701436/harbor,wy65701436/harbor,wy65701436/harbor,reasonerjt/harbor,wy65701436/harbor,reasonerjt/harbor