* HOLDER/HOLDERTAB rename to PROCLOCKLINK/PROCLOCKLINKTAG (Bruce)

Will return later.

existing lock manager and spinlocks: it understands exclusive vs shared
lock but has few other fancy features.  Replace most uses of spinlocks
with lightweight locks.  All remaining uses of spinlocks have very short
lock hold times (a few dozen instructions), so tweak spinlock backoff
code to work efficiently given this assumption.  All per my proposal on
pghackers 26-Sep-01.

 need more work, but at least they have something now.

Start chapter on recovery techniques. Still needs work for release.

proposal of 26-Aug.

	* Change LIMIT val,val to offset,limit to match MySQL

Documentation updates too.

in messages and documentation.

(salts were always zero!?), add much missing documentation.

rule to remake it when necessary.

a hung client or lost connection can't indefinitely block a postmaster
child (not to mention the possibility of deliberate DoS attacks).
Timeout is controlled by new authentication_timeout GUC variable,
which I set to 60 seconds by default ... does that seem reasonable?

piggybacking on SortMem.  Add documentation for some recently-added
GUC parameters that had so far escaped it.

rather than making index.html a symlink to the autogenerated name.
Fixes fatal problems with tar programs that don't handle symlinks
very well (MacOS X).

(The names user.html, admin.html, etc. are still available as make
targets, but they aren't packaged anymore.)

Use the manifest file that the stylesheets generate as the file list
for packaging.  Put graphics in the right place while building, not
while packaging, so you can actually look at them after building.

counts alongside the planner's estimates.  By Martijn van Oosterhout,
with some further work by Tom Lane.