Autoconf 2.61

When PostgreSQL 8.4 development opens, I would like to upgrade to Autoconf 
2.61.  This has been out for over a year now, and many developers will 
probably find it to be available through their operating system distributor 
already.  If not, consider installing it sometime if you plan to modify the 
relevant source files. (ftp://ftp.gnu.org/gnu/autoconf/)

This update will give us a few enhancements and simplifications and also 
potential for some performance improvements for configure runs.  Most 
notably, the set of available directory options in configure has caught up 
with reality, allowing us to drop a few unpleasant hacks.  For 
example, --docdir and --html are available now.  To clean this up further, I 
have removed the --without-docdir option.  I didn't see any packagers using 
that, and the new set of options should work reasonably for everyone.

Current patch/log is attached.

-- 
Peter Eisentraut
http://developer.postgresql.org/~petere/