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/rm/r-root.sh

@@ -25,7 +25,7 @@ print_ver_ rm
 # enter the unlinkat() system call.  Therefore, limit the risk as much
 # as possible -- if there's a bug this test would wipe the system out!
 
-# Faint-hearted: skip this test for the 'root' user.
+# Fainthearted: skip this test for the 'root' user.
 skip_if_root_
 
 # Pull the teeth from rm(1) by intercepting the unlinkat() system call via the

tests/rm/rm-readdir-fail.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
-# Test rm's behaviour when the directory cannot be read.
+# Test rm's behavior when the directory cannot be read.
 # This test is skipped on systems that lack LD_PRELOAD support.
 
 # Copyright (C) 2016-2023 Free Software Foundation, Inc.