mbedTLS: Disable weak crypto and TLS versions. #76905
Merged
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This commit adds a new mbedTLS configuration header to customize the built-in library (and can be optionally replaced by a platform-specific one).
Currently, it disables most weak cryptographic functions (with the notable exceptions of MD5 and SHA-1), along with removing support for TLS versions 1.0 and 1.1 (making TLSv1.2 the only supported one).
Closes #76838 (superseded).