Removing config.cache from dependencies, because configure does not always update config.cache. (I ended up running configure each time I ran client.mk because configure was newer than config.cache).

tracking rods' change removing bogus extra byte in XIF format converter.

message

terminated string. Apps like MS-Word pass back the size including the terminating
zero. This fixes that.

Bug 4750. Updated RDF_NAMESPACE_URI to refer to the most recent (and final) version of the RDF recommendation.

when loading the initial page

forward&back button

2. Implement the LoadInitialPage so that when -url argument is passed, the
   url passed will be loaded after the navigator.xul is loaded. This method
   can be later used to load the home page from prefs
3. Use the CanGoForward and CanGoBack broadcasters to set the forward and back button
VS: ----------------------------------------------------------------------

Pull out the mailbox service code for displaying and copying a message. Replace it with code that uses the new nsIMsgMessageService. In addition, we are no longer going to support message display from the demos menu. It is no longer necessary as we can display messages by selecting them on the thread pane.

Register the new nsMsgMessageService which is supported by the mailbox service. Add progids for both the mailbox version of the message service and for the mailbox service.

Add Queryinterface method such that it includes nsIMsgMessageService which is a new interface this class supports.