With "%lx" new awk(1) prints 64 bit value also on 32 bit platforms.
Replace it with Perl pack() to get hex representation of -1 on
current platform. Make test pass again on i386.

Do not remove files from CVS tree during make clean.

Make this pass again on 32-bit platforms.

Use REGRESS_TARGETS.

Add a regression test for the extent subroutines; from NetBSD.