* Alternatively, a named configuration blob can be used by setting
* this to blob://blob_name.
*
+ * Alternatively, this can be used to only perform matching of the
+ * server certificate (SHA-256 hash of the DER encoded X.509
+ * certificate). In this case, the possible CA certificates in the
+ * server certificate chain are ignored and only the server certificate
+ * is verified. This is configured with the following format:
+ * hash:://server/sha256/cert_hash_in_hex
+ * For example: "hash://server/sha256/
+ * 5a1bc1296205e6fdbe3979728efe3920798885c1c4590b5f90f43222d239ca6a"
+ *
* On Windows, trusted CA certificates can be loaded from the system
* certificate store by setting this to cert_store://name, e.g.,
* ca_cert="cert_store://CA" or ca_cert="cert_store://ROOT".