jwks support

Readme.md

@@ -20,6 +20,7 @@ Requires at least Mosquitto v1.6.3
 | Property           | Valid values | Usage |
 |--------------------|------|-------|
 | `auth_opt_jwt_alg` | `HS256`, `HS384`, `HS512`, `ES256`, `ES384`, `RS256`, `RS384`, `RS512`| Sets the algorithm of the JWT signature |
+| `auth_opt_jwt_jwks_file` | `<path to file>` | Path to the file which contains a JWK set. The keyid have to be set on both the JWK and the JWT |
 | `auth_opt_jwt_sec_file` | `<path to file>` | Path to the file which contains the secret used for verification of the signature. Should be DER-encoded for RSA |
 | `auth_opt_jwt_sec_env` | `<enviroment variable name>` | Name of the environment variable which contains the base64 encoded secret used for verification of the signature. |
 | `auth_opt_jwt_sec_base64` | `<base64-encoded-secret>` | Base64 encoded secret used for verification of the signature. |