[PATCH v2 0/2] revision.c: implement --reverse=before for walks

Since v1 I've:
	* removed the non stuck form for the --reverse option
	* --reverse with no argument now flips "no reverse -> reverse
	  after", "reverse after -> no reverse" and "reverse before ->
	  no reverse"
	* implemented a window to reduce memory usage when
	  --reverse=before with --max-count=<n>
	* updated the docs to highlight the peculiarities of --reverse
	  when it's specified multiple times

[1/2] revision.c: implement --reverse=before for walks (Mirko Faina) [2/2] revision.c: reduce memory usage on reverse before (Mirko Faina)

 Documentation/rev-list-options.adoc | 14 +++--
 revision.c                          | 85 +++++++++++++++++++++++++++--
 revision.h                          |  8 ++-
 t/t4202-log.sh                      | 66 ++++++++++++++++++++++
 4 files changed, 163 insertions(+), 10 deletions(-)

base-commit: e8955061076952cc5eab0300424fc48b601fe12d