* configure.in (PERL, INSTALL_INFO): Don't AC_SUBST these,

* configure.in (PERL, INSTALL_INFO): Don't AC_SUBST these,

	since AC_PATH_PROG already does it for us.
	(PERL): Rewrite check added in 2000-02-29 change for syntactic
	correctness and sh portability.  I replaced the broken check
	with a more sensible implementation of the apparently intended
	semantics, which might still be questionable.  Using expr causes
	a non-numeric value for `perl -V:apiversion` to be accepted,
	refusing to use only a perl that reports a number less than 5;
	on my system, perl (5.004_04) -V:apiversion produces UNKNOWN.
	* configure: Regenerated.