[Issue 10014] TLS handle using MbedTLS

https://bugs.openldap.org/show_bug.cgi?id=10014

--- Comment #4 from Johan johan.pascal@linphone.org --- I uploaded the code on gitlab, cleaning it a little bit.

https://git.openldap.org/Johan/openldap/-/tree/add/mbedtls_handle

I tried to add a CI run using the mbedtls handle but the CI runner is on debian stable which packages mbedtls-2.16.9 and is not supported by the handle(it requires functions introduced in 2.18.0).

Our use case for OpenLDAP with mbedtls handle, in the linphone project, on debian or distribution supporting openssl is to unify the code base shared on various platform. The same code is built on these platform but also on android or iOS where we rather use mbedtls.