Sets 'path_prefix', as described below.
+=head2 action_args
+
+Allows you to set constructor arguments on your Actions or ActionRoles. You can
+set args globally (all actions of the controller) and specifically (for a single
+action).
+
+ __PACKAGE__->config({
+ action_args => {
+ '*' => {globalarg1=>'hello', globalarg2=>'goodbye'},
+ 'specific_action' => {customarg=>'arg1'},
+ },
+ });
+
+In the case above the action class associated with 'specific_action' would get
+passed the following arguments when it is instantiated: (globalarg1=>'hello',
+globalarg2=>'goodbye', 'customarg=>'arg1').
+
=head1 METHODS
=head2 BUILDARGS ($app, @args)