feat(!783): Add admin commands for managing tokens

conduwuit-example.toml

@@ -421,7 +421,7 @@
 # `yes_i_am_very_very_sure_i_want_an_open_registration_server_prone_to_abuse`
 #
 # If you would like registration only via token reg, please configure
-# `registration_token` or `registration_token_file`.
+# `registration_token`.
 #
 #allow_registration = false
 
@@ -458,16 +458,6 @@
 #
 #registration_token =
 
-# Path to a file on the system that gets read for additional registration
-# tokens. Multiple tokens can be added if you separate them with
-# whitespace
-#
-# continuwuity must be able to access the file, and it must not be empty
-#
-# example: "/etc/continuwuity/.reg_token"
-#
-#registration_token_file =
-
 # The public site key for reCaptcha. If this is provided, reCaptcha
 # becomes required during registration. If both captcha *and*
 # registration token are enabled, both will be required during