Revert #4022, as the solution is incomplete

Revert "Land 4022, datastore should default TLS1 vs SSL3"

This reverts commit 4c8662c6c1171c8ccc161ed90aa144ba29e7de3b, reversing
changes made to 0937f32ff9b9f3d150bb2caea12f21a845dd730c.
Unland #4022 with #4023 (more discussion)
essage aborts