5. Deprecating "max_fragment_length"

5. Deprecating "max_fragment_length"

The record_size_limit extension replaces the max_fragment_length extension [RFC6066]. A server that supports the record_size_limit extension MUST ignore a max_fragment_length that appears in a ClientHello if both extensions appear. A client MUST treat receipt of both max_fragment_length and record_size_limit as a fatal error, and it SHOULD generate an illegal_parameter alert.

Clients that depend on having a small record size MAY continue to advertise the max_fragment_length.