maint: update Bootstrap git module

Fixes bug#47000.

* bootstrap: Regenerated.
* gl-mod/bootstrap: Updated to the latest HEAD.

bootstrap

@@ -9,7 +9,7 @@
 # This is free software.  There is NO warranty; not even for
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# Copyright (C) 2010-2019 Bootstrap Authors
+# Copyright (C) 2010-2019, 2021 Bootstrap Authors
 #
 # This file is dual licensed under the terms of the MIT license
 # <https://opensource.org/license/MIT>, and GPL version 3 or later
@@ -235,7 +235,7 @@ scriptversion=2019-02-19.15; # UTC
 # This is free software.  There is NO warranty; not even for
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# Copyright (C) 2004-2019 Bootstrap Authors
+# Copyright (C) 2004-2019, 2021 Bootstrap Authors
 #
 # This file is dual licensed under the terms of the MIT license
 # <https://opensource.org/license/MIT>, and GPL version 3 or later
@@ -293,6 +293,12 @@ do
 	  _G_safe_locale=\"$_G_var=C; \$_G_safe_locale\"
 	fi"
 done
+# These NLS vars are set unconditionally (bootstrap issue #24).  Unset those
+# in case the environment reset is needed later and the $save_* variant is not
+# defined (see the code above).
+LC_ALL=C
+LANGUAGE=C
+export LANGUAGE LC_ALL
 
 # Make sure IFS has a sensible default
 sp=' '
@@ -531,6 +537,35 @@ sed_double_backslash="\
   s/\\([^$_G_bs]\\)$_G_bs2$_G_dollar/\\1$_G_bs2$_G_bs$_G_dollar/g
   s/\n//g"
 
+# require_check_ifs_backslash
+# ---------------------------
+# Check if we can use backslash as IFS='\' separator, and set
+# $check_ifs_backshlash_broken to ':' or 'false'.
+require_check_ifs_backslash=func_require_check_ifs_backslash
+func_require_check_ifs_backslash ()
+{
+  _G_save_IFS=$IFS
+  IFS='\'
+  _G_check_ifs_backshlash='a\\b'
+  for _G_i in $_G_check_ifs_backshlash
+  do
+  case $_G_i in
+  a)
+    check_ifs_backshlash_broken=false
+    ;;
+  '')
+    break
+    ;;
+  *)
+    check_ifs_backshlash_broken=:
+    break
+    ;;
+  esac
+  done
+  IFS=$_G_save_IFS
+  require_check_ifs_backslash=:
+}
+
 
 ## ----------------- ##
 ## Global variables. ##
@@ -1271,6 +1306,8 @@ func_quote_portable ()
 {
     $debug_cmd
 
+    $require_check_ifs_backslash
+
     func_quote_portable_result=$2
 
     # one-time-loop (easy break)
@@ -1285,8 +1322,10 @@ func_quote_portable ()
       # Quote for eval.
       case $func_quote_portable_result in
         *[\\\`\"\$]*)
-          case $func_quote_portable_result in
-            *[\[\*\?]*)
+          # Fallback to sed for $func_check_bs_ifs_broken=:, or when the string
+          # contains the shell wildcard characters.
+          case $check_ifs_backshlash_broken$func_quote_portable_result in
+            :*|*[\[\*\?]*)
               func_quote_portable_result=`$ECHO "$func_quote_portable_result" \
                   | $SED "$sed_quote_subst"`
               break
@@ -1660,7 +1699,7 @@ func_lt_ver ()
 # This is free software.  There is NO warranty; not even for
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# Copyright (C) 2010-2019 Bootstrap Authors
+# Copyright (C) 2010-2019, 2021 Bootstrap Authors
 #
 # This file is dual licensed under the terms of the MIT license
 # <https://opensource.org/license/MIT>, and GPL version 3 or later
@@ -2219,7 +2258,7 @@ else
 
       func_split_equals_lhs=`expr "x$1" : 'x\([^=]*\)'`
       func_split_equals_rhs=
-      test "x$func_split_equals_lhs" = "x$1" \
+      test "x$func_split_equals_lhs=" = "x$1" \
         || func_split_equals_rhs=`expr "x$1" : 'x[^=]*=\(.*\)$'`
   }
 fi #func_split_equals
@@ -2245,7 +2284,7 @@ else
   {
       $debug_cmd
 
-      func_split_short_opt_name=`expr "x$1" : 'x-\(.\)'`
+      func_split_short_opt_name=`expr "x$1" : 'x\(-.\)'`
       func_split_short_opt_arg=`expr "x$1" : 'x-.\(.*\)$'`
   }
 fi #func_split_short_opt
@@ -2345,7 +2384,7 @@ func_version ()
 # This is free software.  There is NO warranty; not even for
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# Copyright (C) 2010-2019 Bootstrap Authors
+# Copyright (C) 2010-2019, 2021 Bootstrap Authors
 #
 # This file is dual licensed under the terms of the MIT license
 # <https://opensource.org/license/MIT>, and GPL version 3 or later

gl-mod/bootstrap

@@ -1 +1 @@
-Subproject commit 037f83765b6e8f90dfabdfac4889be22a5a3f4a4
+Subproject commit 3d6394c3617a6a79e460ac513fa3281f8ae72cd0