system_ca_certs
Description:
When true, overrides the ca_path and phase2_ca_path properties using the system CA directory specified at configure time with the --system-ca-path switch.
The certificates in this directory are added to the verification chain in addition to any certificates specified by the ca_cert and phase2_ca_cert properties. If the path provided with --system-ca-path is rather a file name (bundle of trusted CA certificates), it overrides ca_cert and phase2_ca_cert properties instead (sets ca_cert/ca_cert2 options for wpa_supplicant).