use generic sed test so this works on autoconf 2.59
diff --git a/ChangeLog b/ChangeLog
index f84b800..1dfb4e5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2007-02-06 Greg Troxel <Greg Troxel <gdt@ir.bbn.com>>
+
+ * configure.ac: Use generic sed test, since autoconf 2.59 lacks
+ AC_PROG_SED and while 2.59 is somewhat crufty, it isn't officially
+ crufty.
+
2007-02-06 Greg Troxel <Greg Troxel <gdt@ir.bbn.com>
* bootstrap.sh: use -i to install missing files
diff --git a/configure.ac b/configure.ac
index 22077bf..ade8132 100755
--- a/configure.ac
+++ b/configure.ac
@@ -64,7 +64,10 @@
AC_PROG_CPP
AC_PROG_EGREP
-AC_PROG_SED
+
+dnl autoconf 2.59 appears not to support AC_PROG_SED
+dnl AC_PROG_SED
+AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
dnl ------------------------------------------------------------------
dnl Intel compiler check. Although Intel tries really hard to make icc