mbedtls/ChangeLog.d/remove_default_alllow_sha1.txt

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Removals
* Remove config option MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES,
which allowed SHA-1 in the default TLS configuration for certificate
signing. It was intended to facilitate the transition in environments
with SHA-1 certificates. SHA-1 is considered a weak message digest and
its use constitutes a security risk.
Changes
* Set config option MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE to be
disabled by default.