Name: tls_versions
Type: STRING
Default-Value: tls1_0 tls1_1 tls1_2 tls1_3
Last-Modified: 3.1.8

A list of SSL/TLS versions to not disable. Cyrus IMAP SSL/TLS starts with
all protocols, and subtracts protocols not in this list. Newer versions of
SSL/TLS will need to be added here to allow them to get disabled.
