* Restconf authentication callback (ca_auth) signature changed

* Not backward compatible: All uses of the ca-auth callback in restconf plugins must be changed
  * New version is: `int ca_auth(h, req, auth_type, authp, userp)`
    * where `auth_type` is the requested authentication-type (none, client-cert or user-defined)
    * `authp` is the returned authentication flag
    * `userp` is the returned associated authenticated user
    * and the return value is three-valued: -1: Error, 0: ignored, 1: OK
  * For more info see [clixon-docs](https://clixon-docs.readthedocs.io/en/latest/restconf.html)
* New clixon-restconf@2020-12-30.yang revision

test/test_restconf_err.sh

@@ -30,6 +30,9 @@ fyang2=$dir/augment.yang
 fxml=$dir/initial.xml
 fstate=$dir/state.xml
 
+# Define default restconfig config: RESTCONFIG
+restconf_config none
+
 #  <CLICON_YANG_MODULE_MAIN>example</CLICON_YANG_MODULE_MAIN>
 cat <<EOF > $cfg
 <clixon-config xmlns="http://clicon.org/config">
@@ -256,4 +259,7 @@ fi
 # kill backend
 stop_backend -f $cfg
 
+# Set by restconf_config
+unset RESTCONFIG
+
 rm -rf $dir