Bug 863728 - Implement the replacement encoding. r=emk.
Bug 941562 - Make the encoding of documents that declare HZ unoverridable. r=emk.

--HG--
rename : docshell/test/browser/browser_bug234628-6.js => docshell/test/browser/browser_bug941562.js
rename : docshell/test/browser/file_bug234628-7-child.html => docshell/test/browser/file_bug941562-child.html
rename : docshell/test/browser/file_bug234628-6.html => docshell/test/browser/file_bug941562.html