Merge branch 'vd/sparse-sparsity-fix-on-read'

Ensure that the sparseness of the in-core index matches the index.sparse configuration specified by the repository immediately after the on-disk index file is read. * vd/sparse-sparsity-fix-on-read: sparse-index: update do_read_index to ensure correct sparsity sparse-index: add ensure_correct_sparsity function sparse-index: avoid unnecessary cache tree clearing test-read-cache.c: prepare_repo_settings after config init