AC_PROG_SED selecting correct sed for config.status

[Albert Chin]

Is there a reason autoconf doesn't use AC_PROG_SED internally to
select a more-appropriate sed command to use in config.status?

Could we just AC_REQUIRE(AC_PROG_SED) in _AC_OUTPUT_CONFIG_STATUS and
then use $SED throughout generation of config.status?

-- 
albert chin (address@hidden)