[Chameleon] Start up layers

[Eric Bridger]

I'd like to be able to start up my application with various layers
turned on without using the map file.  Ideally with a CGI command line
parameter e.g. layers=land+boundaries+etc. In other cases a different
set of layers would be sent. Is this possible?

What do you think would be the best approach to this.

After the initial startup I'm using the XMLThemeLegend widget to control
layers.

Eric