Announcing dhcp-3.0.1rc2

[Ted Lemon]

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I've just cut a new release candidate for 3.0.1.   This includes a bunch of
failover fixes.   The software is available at:

	 ftp://ftp.isc.org/isc/dhcp/dhcp-3.0.1rc2.tar.gz.

Here's the changelog:

		        Changes since 3.0.1rc1

- Treat NXDOMAIN and NXRRSET as success when we are trying to delete a
   domain or RRSET.   This allows the DHCP server to forget about a name
   it added to the DNS once it's been removed, even if the DHCP server
   wasn't the one that removed it.

- Install defaults for failover maximum outstanding updates and maximum
   silent time.   This prevents problems that might occur if these values
   were not configured.

- Don't do DDNS deletes if ddns-update-style is none.

- Return relay agent information options in DHCPNAK.   This prevents DHCPNAK
   messages from being dropped when the relay agent information option 
contains
   routing information.

- Fix a problem where coming up in recover wouldn't result in an update
   request being sent.

- Add some more chatty messages when we start a recovery update and when it'
s
   done.

- Fix a possible problem where some state might have been left around
   after the peer lost contact and regained contact about how many updates
   were pending.

- Don't nix a lease update because of a lease conflict.   This test has
   never (as far as I know) prevented a mistake, and it appears to cause
   problems with failover.

- Add support in rc history code for keeping a selective history, rather
   than a history of all references and dereferences.   This code is only 
used
   when extensive additional debugging is enabled.

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