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, 5 insertions, 5 deletions

diff --git a/src/w32proc.c b/src/w32proc.c
index ab0bf0fff08..8e878e6ef3e 100644
--- a/src/w32proc.c
+++ b/src/w32proc.c
@@ -2002,9 +2002,9 @@ sys_spawnve (int mode, char *cmdname, char **argv, char **envp)
     }
 
   /* we have to do some conjuring here to put argv and envp into the
-     form CreateProcess wants...  argv needs to be a space separated/null
-     terminated list of parameters, and envp is a null
-     separated/double-null terminated list of parameters.
+     form CreateProcess wants...  argv needs to be a space separated/NUL
+     terminated list of parameters, and envp is a NUL
+     separated/double-NUL terminated list of parameters.
 
      Additionally, zero-length args and args containing whitespace or
      quote chars need to be wrapped in double quotes - for this to work,
@@ -3393,10 +3393,10 @@ If LCID (a 16-bit number) is not a valid locale, the result is nil.  */)
       got_full = GetLocaleInfo (XFIXNUM (lcid),
                                 XFIXNUM (longform),
                                 full_name, sizeof (full_name));
-      /* GetLocaleInfo's return value includes the terminating null
+      /* GetLocaleInfo's return value includes the terminating NUL
          character, when the returned information is a string, whereas
          make_unibyte_string needs the string length without the
-         terminating null.  */
+         terminating NUL.  */
       if (got_full)
         return make_unibyte_string (full_name, got_full - 1);
     }