Fix misuses of NULL when talking about the NUL character

* lisp/subr.el (inhibit-null-byte-detection): Make it an obsolete alias.

* src/coding.c (setup_coding_system): Use new name.
(detect_coding): Rename null_byte_found => nul_byte_found.
(detect_coding_system): Use new name.
Rename null_byte_found => nul_byte_found.
(Fdefine_coding_system_internal): Use new name.
(syms_of_coding): Rename inhibit-null-byte-detection to
inhibit-nul-byte-detection.
* src/w16select.c (get_clipboard_data): null_char => nul_char.
* src/json.c (check_string_without_embedded_nuls): Rename from
check_string_without_embedded_nulls.
(Fjson_parse_string): Adjust accordingly.
* src/coding.h (enum define_coding_undecided_arg_index)
(enum coding_attr_index): ...null_byte... => ...nul_byte....
* lisp/info.el (info-insert-file-contents, Info-insert-dir):
* lisp/international/mule.el (define-coding-system):
* lisp/vc/vc-git.el (vc-git--call):
* doc/lispref/nonascii.texi (Lisp and Coding Systems): Use the new name.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
index 362bd663878..8fb6db987b5 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -737,7 +737,8 @@ void
 force_auto_save_soon (void)
 {
   last_auto_save = - auto_save_interval - 1;
-
+  /* FIXME: What's the relationship between forcing auto-save and adding
+     a buffer-switch event?  */
   record_asynch_buffer_change ();
 }
 #endif
@@ -6191,7 +6192,7 @@ parse_modifiers_uncached (Lisp_Object symbol, ptrdiff_t *modifier_end)
 static Lisp_Object
 apply_modifiers_uncached (int modifiers, char *base, int base_len, int base_len_byte)
 {
-  /* Since BASE could contain nulls, we can't use intern here; we have
+  /* Since BASE could contain NULs, we can't use intern here; we have
      to use Fintern, which expects a genuine Lisp_String, and keeps a
      reference to it.  */
   char new_mods[sizeof "A-C-H-M-S-s-up-down-drag-double-triple-"];