module to create dynamic PerlIO layers

 PerlIO::via::dynamic is used for creating dynamic PerlIO layers. It is
 useful when the behavior or the layer depends on variables. You should
 not use this module as via layer directly (ie :via(dynamic)).
 .
 Use the constructor to create new layers, with two arguments:
 translate and untranslate. Then use $p->via ($fh) to wrap the
 handle.
 .
 Note that PerlIO::via::dynamic uses the scalar fields to reference to
 the object representing the dynamic namespace. If you