OpenSSL: Initialise PKCS#11 engine even if found with ENGINE_by_id()

OpenSSL: Initialise PKCS#11 engine even if found with ENGINE_by_id()

Recent versions of engine_pkcs11 are set up to be autoloaded on demand
with ENGINE_by_id() because they don't need explicit configuration.

But if we *do* want to explicitly configure them with a PKCS#11 module
path, we should still do so.

We can't tell whether it was already initialised, but it's harmless to
repeat the MODULE_PATH command if it was.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Tested-by: Michael Schaller <misch@google.com>