build: do not use AC_PREFIX_PROGRAM

* configure.ac: Do not use "AC_PREFIX_PROGRAM(gzip)".
It would induce behavior that is so surprising that it is probably
universally considered to be buggy, these days.  Reported by Zube
in http://thread.gmane.org/gmane.comp.gnu.gzip.bugs/273

diff --git a/configure.ac b/configure.ac
index 174a59eef13abc23ff8e93988985a86f0069db16..c568c022577ee83522208d92e33f9d46d8806a7d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -109,7 +109,5 @@ AC_TYPE_SIGNAL
 AC_TYPE_SIZE_T
 AC_TYPE_OFF_T
 
-AC_PREFIX_PROGRAM(gzip)
-
 AC_CONFIG_FILES([Makefile doc/Makefile lib/Makefile])
 AC_OUTPUT