Revert a fix for $? including non-existent files as it shows a bug
in the Linux kernel build. Give them a release to fix this.
Add some changes from Eli Z. for Windows changes.
- Apply a fix for the "thundering herd" problem when using "-j -l".
This also fixes bug #4693.
- Fix bug #7257: allow functions as ifdef arguments
- Fix bug #4518: make sure we print all double-colon rules with -p.
- Upgrade to autconf 2.58/automake 1.8/gettext 0.13.1
- Various doc cleanups, etc.
Fixed problems with the dist target (adding missing files).
Workaround for a bug in gettext 0.12.1 po/Makefile.in.in where distclean
wasn't cleaning everything, which caused distcheck to fail.