[mbed-tls] Mbed TLS releases: 2.26.0, 2.16.10 and 2.7.19

Hi Mbed TLS users,

We have released Mbed TLS versions 2.7.19, 2.16.10 and 2.26.0.

These releases of Mbed TLS address several security issues, provide bug fixes, and bring other minor changes. Full details are available in the release notes (https://github.com/ARMmbed/mbedtls/releases/tag/mbedtls-2.26.0, https://github.com/ARMmbed/mbedtls/releases/tag/mbedtls-2.16.10, https://github.com/ARMmbed/mbedtls/releases/tag/mbedtls-2.7.19).

We recommend all users to consider whether they are impacted, and to upgrade appropriately.

Please note that there will be no further releases on the 2.7 branch, as this is now out of the three year support period.

Dave Rodgman