maint: spelling fixes, including author names

Most of this just affects commentary and documentations.  The only
significant behavior change is translating author names via
proper_name_lite rather than proper_name_utf8, or not translating
them at all.  proper_name_lite is good enough for coreutils and
avoids the bloat that had coreutils not using Gnulib proper_name.
* bootstrap.conf (gnulib_modules): Use propername-lite instead
of propername.
(XGETTEXT_OPTIONS): Look for proper_name_lite instead of for
proper_name_utf8.
* cfg.mk (local-checks-to-skip): Remove
sc_proper_name_utf8_requires_ICONV, since we no longer use
proper_name_utf8.
(old_NEWS_hash): Update.
(sc_check-I18N-AUTHORS): Remove; no longer needed.

tests/ls/color-ext.sh

@@ -29,7 +29,7 @@ c_jpg=$(printf '\033[%sm' $code_jpg)
 c_JPG=$(printf '\033[%sm' $code_JPG)
 c_z=$(printf '\033[%sm' $code_z)
 
-# Case insenitive extensions
+# Case insensitive extensions
 LS_COLORS="*.jpg=$code_jpg:*.Z=$code_z" ls -U1 --color=always \
   img1.jpg IMG2.JPG file1.z file2.Z > out || fail=1
 printf "$c0\

tests/ls/ls-misc.pl

@@ -240,7 +240,7 @@ my @Tests =
      ],
 
      # Test for a bug fixed after coreutils-8.13
-     # where 'argetm' was errenously printed for dangling links
+     # where 'argetm' was erroneously printed for dangling links
      # when ln=target was used in LS_COLORS
      ['sl-dangle6', '-L --color=always d',
       {OUT => "s\n"},

tests/ls/zero-option.sh

@@ -21,7 +21,7 @@ print_ver_ ls
 
 mkdir dir && touch dir/a dir/b dir/cc || framework_failure_
 
-allowed_options='-l'  # explict -l with --zero is allowed
+allowed_options='-l'  # explicit -l with --zero is allowed
 LC_ALL=C ls $allowed_options --zero dir >out || fail=1
 grep '^total' out || fail=1  # Ensure -l honored