[PATCH v3 0/7] Fix some problems with reflog expiration

This is v3 of the patch series. Thanks to Junio for his comments about v2 [1]; I think this version addresses all of his points.

Changes since v2:

* Introduce a temporary in "struct ref_lock: delete the force_write
  member" to make a complicated boolean expression easier to
  understand.

* Split the documentation of options for "reflog expire" and "reflog
  delete", and make another couple tweaks to the "reflog"
  documentation.

* Add a NEEDSWORK comment suggesting that the "reflog" command should
  use parse_options() to process its command line.

[1] http://thread.gmane.org/gmane.comp.version-control.git/264586

Michael Haggerty (6):
  write_ref_sha1(): remove check for lock == NULL
  write_ref_sha1(): Move write elision test to callers
  lock_ref_sha1_basic(): do not set force_write for missing references
  reflog: improve and update documentation
  reflog_expire(): ignore --updateref for symbolic references
  reflog_expire(): never update a reference to null_sha1

Stefan Beller (1):
  struct ref_lock: delete the force_write member

 Documentation/git-reflog.txt | 144 ++++++++++++++++++++++++++-----------------
 builtin/reflog.c             |   9 +--
 refs.c                       |  65 ++++++++++---------
 3 files changed, 126 insertions(+), 92 deletions(-)