unioning overlapping host-sources

[snehanie]

Hi,

For example,

CSP with following headers containg wildcards:

1. default-src: http://*.atest.com 'self';
2. default-src: http://b.c.atest.com 'self';
   union of this should result in
   default-src: http://*.atest.com 'self';

Support for the above problem, please.