[master] fix typo in message file expansion ordering

the RRsets and class were reversed. This was the only
example in all .mes files that had the numbers out of order.

Okayed via jabber.

This fixes:

2011-08-15 14:37:22.991 DEBUG [b10-resolver.cache] CACHE_RRSET_INIT initializing RRset cache for IN RRsets of class 10000

to:

2011-08-16 11:01:50.899 DEBUG [b10-resolver.cache] CACHE_RRSET_INIT initializing RRset cache for 10000 RRsets of class IN

One thing to note:  If this was a production server, we would need
to consider deprecating this message ID and creating a new message ID
as use of the logged results would be broken, because problem is in
the logged brief explanation and not the full description.
I will send an email about this.

src/lib/cache/cache_messages.mes

@@ -124,7 +124,7 @@ the message will not be cached.
 Debug message. The requested data was found in the RRset cache. However, it is
 expired, so the cache removed it and is going to pretend nothing was found.
 
-% CACHE_RRSET_INIT initializing RRset cache for %2 RRsets of class %1
+% CACHE_RRSET_INIT initializing RRset cache for %1 RRsets of class %2
 Debug message. The RRset cache to hold at most this many RRsets for the given
 class is being created.