Corrections o the migration guide
Remove MBEDTLS_SSL_RECORD_CHECKING option and enable its action by default
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-This change does not affects users who use the default config.h, as the
+This change does not affect users who use the default config.h, as the
option MBEDTLS_SSL_RECORD_CHECKING was already on by default.
-This option was added only to controls compilation of one function
+This option was added only to control compilation of one function
(mbedtls_ssl_check_record()) used in DTLS to check a buffer's validity and
authenticity. Switching it off poses a security risk.
