* use new deprecated printer for all deprecated server options
* restore alphabetic option sorting order
* move deprecated printer from mysqld.cc to my_getopt.c
* in --help print deprecation message at the end of the option help
* move 'ALL' help text where it belongs - to other SET options, and
  with a correct indentation.
* consistently end all or none command-line option help strings
  with a dot - my_print_help() needs that.
  It's about 50/50 now, so let's do none, less line wraps in --help
* remove trailing spaces from command-line option help strings

this test loads sql_errlog plugin. then in a second connection
it triggers an error, this locks the plugin in that thd.
then the plugin is uninstalled in the default connection.
but that doesn't unload the plugin, as it's still locked. it'll
auto-unload after the foo connection is closed. without an explicit
disconnect it is closed after mysqltest exits and the post-test check
might still see sql_errlog not fully unoaded.

Show the config file in I_S.SYSTEM_VARIABLES
But only if the user has FILE privilege