[freenet-dev] Freenet 0.7 build 1040

[Matthew Toseland]

Freenet 0.7 build 1040 is now available. This will be mandatory at midnight 
GMT on Friday. Please upgrade! (You may find it helpful to enable 
auto-upgrade on your node configuration, under node.updater)! Please tell us 
if the updater isn't working - your node should be able to update even if all 
its peers are listed as TOO NEW, as of a few builds ago.

Changes:
- More work on probe requests. We are trying to devise a new HTL/backtracking 
algorithm which doesn't get caught down rabbit holes, but which doesn't go to 
too many nodes either. Probe requests enable us to do this in a controlled 
environment, as well as to study routing in general, without being a great 
threat to security. This is the main reason for so many mandatory builds over 
a short period of time.
- Back-door coalescing: When we get a key (when a block is written to the 
datastore), we automatically pass it to all clients who were waiting for that 
key. Even if we fetched it for another client, and even if it was fetched, or 
inserted, by an external request. This should help when there are multiple 
requests queued with many of the same blocks, amongst other cases. It's also 
in preparation for ultra-lightweight passive requests.
- More preparation for failure tables and ultra-lightweight passive requests: 
new failure mode/message Recently Failed, indicates that a request for a key 
reached a node where a similar request had recently failed, and so the 
request was killed, along with when it will be possible to send a request for 
that key again. This isn't used yet, but it will be.
- Minor datastore fix (verify SSKs from the store), minor random number 
generation fixes.
- Some work on unit tests from sback.
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