openssl: Protect dynamic c structures in wrapper functions

The upstream openssl wrapper has a potential problem where the garbage collector can accidentally call finalizer functions before entering a C function (see attachment for an example where this happens).

Acceptance criteria:

• Update our OpenSSL fork and make sure all functions using cgo call with a C-type structure with a finalizer ends with a call to runtime.KeepAlive with the C-type structure as argument.