Partial bundle follow ups

For Junio
=========

This is based on master, which recently took ds/partial-bundles.

There are a couple conflicts with 'seen':

* rc/fetch-refetch adds the "--refetch" option right next to where I remove an instance of CL_ARG__FILTER.
* tb/cruft-packs updates the add_unseen_recent_objects_to_traversal() method, but this series changes one call from using "&revs" to using "revs".

Hopefully these are easy conflicts to resolve.

Series Goals
============

These are a few cleanups that were discussed as part of ds/partial-bundles.

* Patch 1 removes the CL_ARG__FILTER macro.
* Patches 2-3 help parse --filter directly into a revs.filter member instead of copying it from another filter_options.
* Patches 4-5 add output of the hash function capability in 'git bundle verify'. It also moves the capability output to the end, since it looks a bit strange in the current location when there are boundary commits.

Series Non-Goals
================

Some items were discussed that I either attempted and dropped, or delayed for another series:

* create_bundle() in bundle.c does two commit walks: first to discover the boundary commits to write into the bundle header, and then another that happens when constructing the pack-file. It looks like this could be avoided if there will not be any boundary, but there are additional checks in write_bundle_refs() that look for the SHOWN bit on the commit objects in order to determine if a requested ref would be excluded by the rev-list options. This behavior seems important, so I did not remove it.

* 'git clone --bare partial.bdl" should work when partial.bdl is a partial bundle. However, this requires changing the way we configure partial cloned repositories to not rely on a remote in order to understand an object filter. I'm working on this as a parallel series that will likely require more discussion than these small cleanups.

* Ævar pointed out some newly-visible memory leaks due to moving the filter out of a static global. After looking at the recommended change, it seems that we actually need to be more careful about freeing the revs and not just revs.filter.

Thanks, -Stolee

Derrick Stolee (5):
list-objects-filter: remove CL_ARG__FILTER
pack-objects: move revs out of get_object_list()
pack-objects: parse --filter directly into revs.filter
bundle: move capabilities to end of 'verify'
bundle: output hash information in 'verify'

 Documentation/git-bundle.txt  | 10 +++++-----
 builtin/fetch-pack.c          |  4 ++--
 builtin/pack-objects.c        | 37 +++++++++++++++++------------------
 bundle.c                      | 11 ++++++-----
 list-objects-filter-options.h |  5 +----
 revision.c                    |  4 ++--
 t/t6020-bundle-misc.sh        | 26 ++++++++++++++++--------
 7 files changed, 52 insertions(+), 45 deletions(-)

base-commit: f01e51a7cfd75131b7266131b1f7540ce0a8e5c1
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1186%2Fderrickstolee%2Fpartial-bundle-follow-up-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1186/derrickstolee/partial-bundle-follow-up-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/1186

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