[PING 0.9] ignores, http, cache inventory.knit, readv

[John Arbash Meinel]

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I have 4 fairly major patches pending approval, which I think are all
worthy of going into 0.9. A couple of them have sat for most of a week
without any comments, so I'd like to ping again. (Especially since we
were hoping to release 0.9rc1 today).

ignores -
  Add a global user ignore list to ~/.bazaar/ignore
  create it if it doesn't exist, with a small but reasonable list

http -
  3x performance boost for 'bzr branch' over http by using multi-range
  requests for readv().
  Only known problem is that it doesn't properly support redirects.

cache inventory.knit -
  When Aaron removed knit caches, it caused us to download
  inventory.knit 2 times. This patch explicitly re-enables caching of
  just inventory.knit, and only for the time in Knit.join(), and only
  for the revisions that need to be merged.
  This has some concern for large trees, so I'm willing to update it,
  so that it only enables caching if the Knit is not Local, and I can
  change the cache to be an on-disk cache if the memory consumption
  becomes too large. (I will work on that today.)

readv -
  2x performance improvement for branch and pull over sftp.


John
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