[Seaside] releases

[Avi Bryant]

I've put Seaside 2.5b4 up on SqueakMap.  The changes from b3 are:

- I've included Michel's snapshotting refactoring, so that objects can 
determine how they are backtrack.  I decided that this was a small 
enough, obvious enough, and backwards compatible enough enhancement to 
go into the beta stream.
- Inst var info is now included in walkback pages,
- there's a liveCallback version of #selectFromList:,
- liveUpdate now uses timestamps to fool the IE cache (thanks Rado for 
these last three)
- #passwordInputWithValue:callback:
- #submitButtonWithAction:image: works again (thanks Adrian)
- there's a new decoration, WASessionProtector, that restricts its 
contents to a single client IP, to avoid session hijacking (thanks 
Lukas)

I've also updated the 2.6a release to 2.6a-avi.4.  This includes a 
first cut at the #forwarder mechanism that's been under discussion, as 
well as all of the above fixes.

There is at least one known bug in both of these versions, which is 
that page expiry is broken - if you click on an expired page inside an 
active session, you'll get redirected to a blank response rather than 
to the most recent point in the session as you are in 2.3.  This will 
definitely be fixed before a full release, but I haven't had time to 
address it yet.

Trying to maintain these two separate streams has really highlighted 
for me a well-known weakness in Monticello, which is that it's 
impossible to do a proper selective merge, bringing only some changes 
from one branch into another.  Rather than continue to struggle with 
it, I think it's time to finally just fix it.  Luckily, this has been 
under heavy discussion on the Monticello list recently, and so some 
solutions are on the table.  Hopefully I can put Camp Smalltalk at ESUG 
next week to good use and get a preliminary version of selective 
merging out.

I mention this here because I think that further work on Seaside will 
be pretty much on hold for a couple of weeks while I do some intensive 
Monticello hacking, and also because it's quite likely that future 
releases of Seaside will require a new Monticello version.  Consider 
yourself warned.

Cheers,
Avi