gh-106948: Add standard external names to nitpick_ignore (GH-106949)

It includes standard C types, macros and variables like "size_t",
"LONG_MAX" and "errno", and standard environment variables like "PATH".

Doc/conf.py

@@ -77,6 +77,58 @@ if venvdir is not None:
     exclude_patterns.append(venvdir + '/*')
 
 nitpick_ignore = [
+    # Standard C types
+    ('c:type', 'FILE'),
+    ('c:type', '__int'),
+    ('c:type', 'intmax_t'),
+    ('c:type', 'off_t'),
+    ('c:type', 'ptrdiff_t'),
+    ('c:type', 'siginfo_t'),
+    ('c:type', 'size_t'),
+    ('c:type', 'ssize_t'),
+    ('c:type', 'time_t'),
+    ('c:type', 'uintmax_t'),
+    ('c:type', 'va_list'),
+    ('c:type', 'wchar_t'),
+    # Standard C macros
+    ('c:macro', 'LLONG_MAX'),
+    ('c:macro', 'LLONG_MIN'),
+    ('c:macro', 'LONG_MAX'),
+    ('c:macro', 'LONG_MIN'),
+    # Standard C variables
+    ('c:data', 'errno'),
+    # Standard environment variables
+    ('envvar', 'BROWSER'),
+    ('envvar', 'COLUMNS'),
+    ('envvar', 'COMSPEC'),
+    ('envvar', 'DISPLAY'),
+    ('envvar', 'HOME'),
+    ('envvar', 'HOMEDRIVE'),
+    ('envvar', 'HOMEPATH'),
+    ('envvar', 'IDLESTARTUP'),
+    ('envvar', 'LANG'),
+    ('envvar', 'LANGUAGE'),
+    ('envvar', 'LC_ALL'),
+    ('envvar', 'LC_CTYPE'),
+    ('envvar', 'LC_COLLATE'),
+    ('envvar', 'LC_MESSAGES'),
+    ('envvar', 'LC_MONETARY'),
+    ('envvar', 'LC_NUMERIC'),
+    ('envvar', 'LC_TIME'),
+    ('envvar', 'LINES'),
+    ('envvar', 'LOGNAME'),
+    ('envvar', 'PAGER'),
+    ('envvar', 'PATH'),
+    ('envvar', 'PATHEXT'),
+    ('envvar', 'SOURCE_DATE_EPOCH'),
+    ('envvar', 'TEMP'),
+    ('envvar', 'TERM'),
+    ('envvar', 'TMP'),
+    ('envvar', 'TMPDIR'),
+    ('envvar', 'TZ'),
+    ('envvar', 'USER'),
+    ('envvar', 'USERNAME'),
+    ('envvar', 'USERPROFILE'),
     # Do not error nit-picky mode builds when _SubParsersAction.add_parser cannot
     # be resolved, as the method is currently undocumented. For context, see
     # https://github.com/python/cpython/pull/103289.