Escaping more characters in portlet urls

[David Jencks]

In geronimo we've had some problems with ';' not getting escaped in  
some portlet urls, see PLUTO-579.  The escaping algorithm currently  
used looks really inefficient.  One of the Geronimo developers (Ivan)  
came up with a patch that looks good to me and I've applied to  
branches-1.1.x.  I think it would be appropriate for trunk as well,  
the code looks about the same.

Could one of the pluto devs more familiar with this area take a look  
and make sure I'm not missing the point before I go ahead any apply it  
to trunk?

many thanks
david jencks