Merge branch 'jk/plug-list-object-filter-leaks'

The code that manages list-object-filter structure, used in partial clones, leaked the instances, which has been plugged. * jk/plug-list-object-filter-leaks: prepare_repo_settings(): plug leak of config values list_objects_filter_options: plug leak of filter_spec strings transport: free filter options in disconnect_git() transport: deep-copy object-filter struct for fetch-pack list_objects_filter_copy(): deep-copy sparse_oid_name field