Changes nsIPermissionManager.idl to accept type strings rather than integers; this allows consumers to register unique types more easily, without fear of conflicting with an already-existing one.
Also fixes some bounds-checking fu (sr=bz on irc for those additional portions).
patch by mvl; r=dwitte, sr=bz.
gerv%gerv.net
dwitte%stanford.edu
bzbarsky%mit.edu
morse%netscape.com