3241. [func] Extended the header of raw-format master files to

3241.	[func]		Extended the header of raw-format master files to
			include the serial number of the zone from which
			they were generated, if different (as in the case
			of inline-signing zones).  This is to be used in
			inline-signing zones, to track changes between the
			unsigned and signed versions of the zone, which may
			have different serial numbers.

			(Note: raw zonefiles generated by this version of
			BIND are no longer compatble with prior versions.
			To generate a backward-compatible raw zonefile
			using dnssec-signzone or named-compilezone, specify
			output format "raw=0" instead of simply "raw".)
			[RT #26587]