Merge branch 'jk/unused-post-2.39-part2'

More work towards -Wunused.

* jk/unused-post-2.39-part2: (21 commits)
  help: mark unused parameter in git_unknown_cmd_config()
  run_processes_parallel: mark unused callback parameters
  userformat_want_item(): mark unused parameter
  for_each_commit_graft(): mark unused callback parameter
  rewrite_parents(): mark unused callback parameter
  fetch-pack: mark unused parameter in callback function
  notes: mark unused callback parameters
  prio-queue: mark unused parameters in comparison functions
  for_each_object: mark unused callback parameters
  list-objects: mark unused callback parameters
  mark unused parameters in signal handlers
  run-command: mark error routine parameters as unused
  mark "pointless" data pointers in callbacks
  ref-filter: mark unused callback parameters
  http-backend: mark unused parameters in virtual functions
  http-backend: mark argc/argv unused
  object-name: mark unused parameters in disambiguate callbacks
  serve: mark unused parameters in virtual functions
  serve: use repository pointer to get config
  ls-refs: drop config caching
  ...

diff --cc builtin/cat-file.c
Simple merge

diff --cc builtin/fast-import.c
Simple merge

diff --cc builtin/fetch.c
Simple merge

diff --cc builtin/fsck.c
Simple merge

diff --cc builtin/gc.c
Simple merge

diff --cc builtin/log.c
Simple merge

diff --cc builtin/notes.c
Simple merge

diff --cc builtin/pack-objects.c
Simple merge

diff --cc builtin/prune.c
Simple merge

diff --cc builtin/repack.c
Simple merge

diff --cc builtin/rev-list.c
Simple merge

diff --cc builtin/submodule--helper.c
Simple merge

diff --cc commit.c
Simple merge

diff --cc daemon.c
Simple merge

diff --cc diagnose.c
Simple merge

diff --cc fetch-pack.c
Simple merge

diff --cc help.c
Simple merge

diff --cc hook.c
Simple merge

diff --cc http-backend.c
Simple merge

diff --cc line-log.c
Simple merge

diff --cc log-tree.c
Simple merge

diff --cc ls-refs.c
Simple merge

diff --cc midx.c
Simple merge

diff --cc negotiator/skipping.c
Simple merge

diff --cc notes.c
Simple merge

diff --cc object-file.c
Simple merge

diff --cc object-name.c
Simple merge

diff --cc pack-bitmap.c
Simple merge

diff --cc packfile.c
Simple merge

diff --cc path.c
Simple merge

diff --cc pretty.c
Simple merge

diff --cc reachable.c
Simple merge

diff --cc ref-filter.c
Simple merge

diff --cc revision.c
Simple merge

diff --cc serve.c
Simple merge

diff --cc submodule.c
Simple merge

diff --cc t/helper/test-prio-queue.c
index ac4c65d7056d13490c259be03c60a9bcd91e1b95,496c7be07d2200f248f6a2e41fcd0b58e832289e..4915412e074691f6ddf3396d0ca45dd6b03588ad
--- 1/t/helper/test-prio-queue.c
--- 2/t/helper/test-prio-queue.c
+++ b/t/helper/test-prio-queue.c
@@@ -1,7 -1,8 +1,7 @@@
  #include "test-tool.h"
 -#include "cache.h"
  #include "prio-queue.h"
  
- static int intcmp(const void *va, const void *vb, void *data)
+ static int intcmp(const void *va, const void *vb, void *data UNUSED)
  {
        const int *a = va, *b = vb;
        return *a - *b;

diff --cc t/helper/test-run-command.c
Simple merge

diff --cc upload-pack.c
Simple merge