Merge branch 'master' of github.com:git/git

* 'master' of github.com:git/git: (63 commits) Git 2.31-rc1 Hopefully the last batch before -rc1 Revert "commit-graph: when incompatible with graphs, indicate why" read-cache: make the index write buffer size 128K dir: fix malloc of root untracked_cache_dir commit-graph.c: display correct number of chunks when writing doc/reftable: document how to handle windows fetch-pack: print and use dangling .gitmodules fetch-pack: with packfile URIs, use index-pack arg http-fetch: allow custom index-pack args http: allow custom index-pack args chunk-format: add technical docs chunk-format: restore duplicate chunk checks midx: use 64-bit multiplication for chunk sizes midx: use chunk-format read API commit-graph: use chunk-format read API chunk-format: create read chunk API midx: use chunk-format API in write_midx_internal() midx: drop chunk progress during write midx: return success/failure in chunk write methods ...