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, 3 deletions

diff --git a/src/font.c b/src/font.c
index 9220fb1cd24..5ca89c97dcf 100644
--- a/src/font.c
+++ b/src/font.c
@@ -1007,7 +1007,7 @@ font_expand_wildcards (Lisp_Object *field, int n)
 }
 
 
-/* Parse NAME (null terminated) as XLFD and store information in FONT
+/* Parse NAME (NUL terminated) as XLFD and store information in FONT
    (font-spec or font-entity).  Size property of FONT is set as
    follows:
         specified XLFD fields           FONT property
@@ -1353,7 +1353,7 @@ font_unparse_xlfd (Lisp_Object font, int pixel_size, char *name, int nbytes)
   return len < nbytes ? len : -1;
 }
 
-/* Parse NAME (null terminated) and store information in FONT
+/* Parse NAME (NUL terminated) and store information in FONT
    (font-spec or font-entity).  NAME is supplied in either the
    Fontconfig or GTK font name format.  If NAME is successfully
    parsed, return 0.  Otherwise return -1.
@@ -1725,7 +1725,7 @@ font_unparse_fcname (Lisp_Object font, int pixel_size, char *name, int nbytes)
 
 #endif
 
-/* Parse NAME (null terminated) and store information in FONT
+/* Parse NAME (NUL terminated) and store information in FONT
    (font-spec or font-entity).  If NAME is successfully parsed, return
    0.  Otherwise return -1.  */