Merge branch 'np/pack-v4' into pu

Nico and Duy advancing the eternal vaporware pack-v4.  This is here
primarily for wider distribution of the preview edition.

* np/pack-v4: (88 commits)
  t1050: replace one instance of show-index with verify-pack
  index-pack, pack-objects: allow creating .idx v2 with .pack v4
  unpack-objects: decode v4 trees
  unpack-objects: allow to save processed bytes to a buffer
  unpack-objects: decode v4 commits
  unpack-objects: decode v4 ref-delta
  unpack-objects: decode v4 object header
  unpack-objects: read v4 dictionaries
  unpack-objects: recognize end-of-pack in v4 thin pack
  unpack-objects: report missing object name
  pack v4: add a note that streaming does not support OBJ_PV4_*
  pack-objects: recognize v4 as pack source
  pack-objects: respect compression level in v4
  pack v4: move pv4 objhdr parsing code to packv4-parse.c
  pack v4: lift dict size check in load_dict()
  index-pack: support completing thin packs v4
  index-pack: use nr_objects_final as sha1_table size
  pack v4: support "end-of-pack" indicator in index-pack and pack-objects
  pack-objects: support writing pack v4
  pack-objects: prepare SHA-1 table in v4
  ...

# Conflicts:
# 	builtin/pack-objects.c
# 	upload-pack.c
Merge branch 'jc/ref-excludes' into pu

People often wished a way to tell "git log --branches" (and "git
log --remotes --not --branches") to exclude some local branches
from the expansion of "--branches" (similarly for "--tags", "--all"
and "--glob=<pattern>").  Now they have one.

* jc/ref-excludes:
  document --exclude option
  revision: introduce --exclude=<glob> to tame wildcards
Merge branch 'rv/send-email-cache-generated-mid' into pu

* rv/send-email-cache-generated-mid:
  git-send-email: Cache generated message-ids, use them when prompting
  git-send-email: add optional 'choices' parameter to the ask sub
Merge branch 'jc/reflog-doc' into pu

Document rules to use GIT_REFLOG_ACTION variable in the scripted
Porcelain.  git-rebase--interactive locally violates this, but it
is a leaf user that does not call out to or dot-sources other
scripts, so fixing it is not all that urgent.

* jc/reflog-doc:
  setup_reflog_action: document the rules for using GIT_REFLOG_ACTION

# Conflicts:
# 	Documentation/git.txt
Merge branch 'mg/more-textconv' into pu

Make "git grep" and "git show" pay attention to --textconv when
dealing with blob objects.

I thought this was pretty well designed and executed, but it seems
there are some doubts on the list; kicked back to 'pu'.

* mg/more-textconv:
  grep: honor --textconv for the case rev:path
  grep: allow to use textconv filters
  t7008: demonstrate behavior of grep with textconv
  cat-file: do not die on --textconv without textconv filters
  show: honor --textconv for blobs
  diff_opt: track whether flags have been set explicitly
  t4030: demonstrate behavior of show with textconv

# Conflicts:
# 	diff.h
# 	object.c
# 	object.h
# 	t/t8007-cat-file-textconv.sh
Merge branch 'jh/shorten-refname' into pu

When remotes/origin/HEAD is not a symbolic ref, "rev-parse
--abbrev-ref remotes/origin/HEAD" ought to show "origin", not
"origin/HEAD", which is fixed with this series (if it is a symbolic
ref that points at remotes/origin/something, then it should show
"origin/something" and it already does).

$gmane/225137

* jh/shorten-refname:
  t1514: refname shortening is done after dereferencing symbolic refs
  shorten_unambiguous_ref(): Fix shortening refs/remotes/origin/HEAD to origin
  t1514: Demonstrate failure to correctly shorten "refs/remotes/origin/HEAD"
  t1514: Add tests of shortening refnames in strict/loose mode
Merge branch 'jk/gitweb-utf8' into pu

Various fixes to gitweb.

Drew Northup volunteered to take a look into this.
$gmane/226216

* jk/gitweb-utf8:
  gitweb: Fix broken blob action parameters on blob/commitdiff pages
  gitweb: Don't append ';js=(0|1)' to external links
  gitweb: Make feed title valid utf8
  gitweb: Fix utf8 encoding for blob_plain, blobdiff_plain, commitdiff_plain, and patch
Merge branch 'jc/format-patch' into pu

A new option to send a single patch to the standard output to be
appended at the bottom of a message.  I personally have no need for
this, but it was easy enough to cobble together.  Tests, docs and
stripping out more MIMEy stuff are left as exercises to interested
parties.

tying its loose ends.

* jc/format-patch:
  format-patch: --inline-single
  format-patch: rename "no_inline" field

# Conflicts:
# 	builtin/log.c
# 	log-tree.c
# 	pretty.c
Merge branch 'jc/show-branch' into pu

* jc/show-branch:
  show-branch: use commit slab to represent bitflags of arbitrary width
  show-branch.c: remove "all_mask"
  show-branch.c: abstract out "flags" operation
  show-branch.c: lift all_mask/all_revs to a global static
  show-branch.c: update comment style

# Conflicts:
# 	builtin/show-branch.c
Merge branch 'rj/read-default-config-in-show-ref-pack-refs' into pu

The changes themselves are probably good, but it is unclear what
basic setting needs to be read for which exact operation.

$gmane/228294

* rj/read-default-config-in-show-ref-pack-refs:
  ### DONTMERGE: needs better explanation on what config they need
  pack-refs.c: Add missing call to git_config()
  show-ref.c: Add missing call to git_config()
Merge branch 'tr/merge-recursive-index-only' into pu

Will hold, until we get any user.

* tr/merge-recursive-index-only:
  merge-recursive: -Xindex-only to leave worktree unchanged
  merge-recursive: untangle double meaning of o->call_depth
  merge-recursive: remove dead conditional in update_stages()