apply --whitespace: configuration option.

The new configuration option apply.whitespace can take one of
"warn", "error", "error-all", or "strip".  When git-apply is run
to apply the patch to the index, they are used as the default
value if there is no command line --whitespace option.

Andrew can now tell people who feed him git trees to update to
this version and say:

	git repo-config apply.whitespace error

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/cache.h b/cache.h
index 58eec00e0e..0d3b244ddd 100644
--- a/cache.h
+++ b/cache.h
@@ -161,11 +161,13 @@ extern int hold_index_file_for_update(struct cache_file *, const char *path);
 extern int commit_index_file(struct cache_file *);
 extern void rollback_index_file(struct cache_file *);
 
+/* Environment bits from configuration mechanism */
 extern int trust_executable_bit;
 extern int assume_unchanged;
 extern int only_use_symrefs;
 extern int diff_rename_limit_default;
 extern int shared_repository;
+extern const char *apply_default_whitespace;
 
 #define GIT_REPO_VERSION 0
 extern int repository_format_version;