Merge branch 'PHP-8.1'

* PHP-8.1:
  add note in UPGRADING
  Add --with-external-libcrypt build option display an error message if some algo not available in external libcrypt

Author: remicollet

ext/standard/config.m4

@@ -287,7 +287,7 @@ if test "$ac_cv_crypt_blowfish" = "no" || test "$ac_cv_crypt_des" = "no" || test
     AC_MSG_ERROR([Cannot use external libcrypt as some algo are missing])
    fi
 else
-  AC_DEFINE_UNQUOTED(PHP_USE_PHP_CRYPT_R, 0, [Whether PHP has to use its own crypt_r for blowfish, des and ext des])
+  AC_DEFINE_UNQUOTED(PHP_USE_PHP_CRYPT_R, 0, [Whether PHP has to use its own crypt_r])
 fi
 
 dnl