Merge branch 'jc/varargs-attributes'

Varargs functions that are unannotated as printf-like or execl-like
have been annotated as such.

* jc/varargs-attributes:
  __attribute__: add a few missing format attributes
  __attribute__: mark some functions with LAST_ARG_MUST_BE_NULL
  __attribute__: remove redundant attribute declaration for git_die_config()
  __attribute__: trace2_region_enter_printf() is like "printf"

config.c

@@ -2844,7 +2844,6 @@ void git_die_config_linenr(const char *key, const char *filename, int linenr)
 		    key, filename, linenr);
 }
 
-NORETURN __attribute__((format(printf, 2, 3)))
 void git_die_config(const char *key, const char *err, ...)
 {
 	const struct string_list *values;