Merge branch 'jn/v0-with-extensions-fix' into master

In 2.28-rc0, we corrected a bug that some repository extensions are
honored by mistake even in a version 0 repositories (these
configuration variables in extensions.* namespace were supposed to
have special meaning in repositories whose version numbers are 1 or
higher), but this was a bit too big a change.

* jn/v0-with-extensions-fix:
  repository: allow repository format upgrade with extensions
  Revert "check_repository_format_gently(): refuse extensions for old repositories"

1 files changed, 0 insertions, 1 deletions

diff --git a/cache.h b/cache.h
index 126ec56c7f..654426460c 100644
--- a/cache.h
+++ b/cache.h
@@ -1042,7 +1042,6 @@ struct repository_format {
 	int worktree_config;
 	int is_bare;
 	int hash_algo;
-	int has_extensions;
 	char *work_tree;
 	struct string_list unknown_extensions;
 };