PrivilegesHandler: regexp never matches privileges definitions from content packages

kpauls, as discussed the PrivilegesHandler will never match a privileges.xml file contained in the META_INF folder of a content package. i did an initial test with a AEM specific content package and changing the regexp as follows seems to do the trick:

instead of

"META-INF/vault/privileges\\.xml"

the path-pattern should be

"/META-INF/vault/privileges\\.xml"

this will lead to PrivilegesHandlerTest.matches to fail but that one is anyway a bit odd.... the next test parsePrivileges uses a path String path = "/META-INF/vault/privileges.xml";, which wouldn't match but since PrivilegesHandler.handle is directly called it wasn't noticed.

will try to come up with a reasonable test package that illustrates the issue.