Merge branch 'nl/http-proxy-more' into pu

Still needs to address review comments from Peff, some of which were
partly addressed with later "fixup" patches queued here.

It probably is a good idea to re-roll the entire series.

By Nelson Benitez Leon
* nl/http-proxy-more:
  http: rename HTTP_REAUTH to HTTP_AUTH_RETRY
  http: Avoid limit of retrying request only twice
  http: handle proxy authentication failure (error 407)
  http: fix http_proxy specified without protocol part
  http: handle proxy proactive authentication
  http: try http_proxy env var when http.proxy config option is not set
Merge branch 'mm/push-default-switch-warning' into pu

Will squash the two, but this has to wait for a few release cycles.

By Junio C Hamano (1) and Matthieu Moy (1)
* mm/push-default-switch-warning:
  t5541: warning message is given even with --quiet
  push: start warning upcoming default change for push.default
Merge branch 'jc/split-blob' into pu

Not ready.

I finished the streaming checkout codepath, but as explained in
127b177 (bulk-checkin: support chunked-object encoding, 2011-11-30),
these are still early steps of a long and painful journey. At least
pack-objects and fsck need to learn the new encoding for the series
to be usable locally, and then index-pack/unpack-objects needs to
learn it to be used remotely.

Given that I heard a lot of noise that people want large files, and
that I was asked by somebody at GitTogether'11 privately for an
advice on how to pay developers (not me) to help adding necessary
support, I am somewhat dissapointed that the original patch series
that was sent almost two months ago still remains here without much
comments and updates from the developer community. I even made the
interface to the logic that decides where to split chunks easily
replaceable, and I deliberately made the logic in the original patch
extremely stupid to entice others, especially the "bup" fanboys, to
come up with a better logic, thinking that giving people an easy
target to shoot for, they may be encouraged to help out. The plan is
not working :-(.

* jc/split-blob:
  chunked-object: streaming checkout
  chunked-object: fallback checkout codepaths
  bulk-checkin: support chunked-object encoding
  bulk-checkin: allow the same data to be multiply hashed
  new representation types in the packstream
  packfile: use varint functions

Conflicts:
	t/t1050-large.sh
Merge branch 'jc/run-hook-env-1' into pu

Not urgent.

Updates run_hook() API to be much less specific to "commit".  It would
only be useful if people start doing more interesting things with hooks.

* jc/run-hook-env-1:
  run_hook(): enhance the interface to pass arbitrary environment
Merge branch 'nd/threaded-index-pack' into pu

By Nguyễn Thái Ngọc Duy (3) and Ramsay Jones (1)
* nd/threaded-index-pack:
  index-pack: disable threading if NO_PREAD is defined
  index-pack: support multithreaded delta resolving
  index-pack: split second pass obj handling into own function
  compat/win32/pthread.h: Add an pthread_key_delete() implementation

Conflicts:
	builtin/index-pack.c
Merge branch 'mh/ref-api-lazy-loose' into pu

Refs API is updated to lazily read sub-hierarchies of refs/ namespace,
so that we do not have to grab everything from the filesystem when we
are only interested in listing branches, for example.

This looked mostly sane. Did I miss "needs more work" review comments?

By Michael Haggerty (17) and Junio C Hamano (1)
* mh/ref-api-lazy-loose:
  refs: find_containing_dir() regression
  refs: read loose references lazily
  read_loose_refs(): eliminate ref_cache argument
  struct ref_dir: store a reference to the enclosing ref_cache
  search_for_subdir(): return (ref_dir *) instead of (ref_entry *)
  get_ref_dir(): add function for getting a ref_dir from a ref_entry
  read_loose_refs(): rename function from get_ref_dir()
  refs: wrap top-level ref_dirs in ref_entries
  find_containing_dir(): use strbuf in implementation of this function
  bisect: copy filename string obtained from git_path()
  do_for_each_reflog(): use a strbuf to hold logfile name
  do_for_each_reflog(): return early on error
  get_ref_dir(): take the containing directory as argument
  refs.c: extract function search_for_subdir()
  get_ref_dir(): require that the dirname argument ends in '/'
  get_ref_dir(): rename "base" parameter to "dirname"
  get_ref_dir(): use a strbuf to hold refname
  get_ref_dir(): return early if directory cannot be read
Merge branch 'nd/stream-to-archive' into pu

Stream large blobs directly out to archive files without slurping
everything in memory first.  The streaming version of "tar" may need
further fixing.

Expecting another reroll; the second version already had review exchanges
so I didn't pick it up.

By René Scharfe (6) and Nguyễn Thái Ngọc Duy (4)
* nd/stream-to-archive:
  t5000: rationalize unzip tests
  archive-zip: streaming for deflated files
  archive-zip: streaming for stored files
  archive-zip: factor out helpers for writing sizes and CRC
  archive-zip: remove uncompressed_size
  archive-tar: stream large blobs to tar file
  archive: delegate blob reading to backend
  archive-tar: unindent write_tar_entry by one level
  archive-tar: turn write_tar_entry into blob-writing only
  streaming: void pointer instead of char pointer

Conflicts:
	t/t1050-large.sh
Merge branch 'nh/empty-rebase' into pu

By Neil Horman
* nh/empty-rebase:
  git cherry-pick: do not dereference a potential NULL pointer