This patch moves the ARM configuration before starting the connection process, so
that we can do some provisioning of the FreeRDP settings with the items retrieved
from Azure.
Most notably that allows us to connect directly using RDSTLS security.
TargetCertificate option is set in TARGET_CERTIFICATE_CONTAINER format.
Exposed ELEMENT_TYPE_CERTIFICATE and ENCODING_TYPE_ASN1_DER1 to allow
building it externally in the mentioned format.
