Not a big step forward, but it's something...

estimation operators.  See contrib/likeplanning/README for info.

Remove knowledge of path to documentation source directory from perl
script, instead have Makefile pass it to script.

\copy without arguments failed
commands with too many arguments were too silent

(LIKE and regexp matches).  These are not yet referenced in pg_operator,
so by default the system will continue to use eqsel/neqsel.
Also, tweak convert_to_scalar() logic so that common prefixes of strings
are stripped off, allowing better accuracy when all strings in a table
share a common prefix.

prevent duplicate OIDs from being added.  Clean up redundant error
messages.

print OIDs as %u not %d.

With the default option, pg_ctl can show messages from
postmaster upon its failure.

since it has no way to indicate to its caller that the constant is
actually NULL.  This prevents coredump in cases like
  WHERE textfield < null::text;

subsequent elogs() in the same COPY operation to display the wrong
line number.  Fix is to clear lineno only when elog level is such
that we will not return to caller.

repaired psql option scanning bug (special treatment to \g |pipe)
fixed ipcclean makefile
made configure look for Perl to handle psql help build gracefully

 Thanks to Mika Nystrom <mika@camembert.cs.caltech.edu> for spotting this.

Fix spelling of "millennium".
 Thanks to Mika Nystrom <mika@camembert.cs.caltech.edu> for spotting this.

Update platform support for HPUX, Linux-mips, Linux-ppc, mklinux,
 NetBSD-m68k (may be a bit premature), and Solaris.

Fix spelling of "millennium".
 Thanks to Mika Nystrom <mika@camembert.cs.caltech.edu>.

extern int  inet_aton(const char *cp, struct in_addr * addr);
appearing before the optional #define for const, which was certain
to fail on a machine with neither const nor inet_aton().

Some compilers object to seeing extern and later static ...

compiler will understand them.  configure may have #define'd them to
empty because the local C compiler doesn't understand them, but this
may very well cause a C++ compilation to fail, so don't do it in C++.

all platforms, not just SCO.  The operation is undefined for Unix-domain
sockets anyway.  It seems SCO is not the only platform that complains
instead of treating the call as a no-op.

include the version from backend/port into libpq.
There is a second-rate implementation of inet_aton() already present
in fe-connect.c, #ifdef'd WIN32.  That ought to be removed in favor
of using the better version from port/.  However, since I'm not in a
position to test the WIN32 code, I will leave well enough alone for
this release...

request from XEmacs people.

contained a sub-SELECT nested within an AND/OR tree that cnfify()
thought it should rearrange.  Same physical sub-SELECT node could
end up linked into multiple places in resulting expression tree.
This is harmless for most node types, but not for SubLink.
Repair bug by making physical copies of subexpressions that get
logically duplicated by cnfify().  Also, tweak the heuristic that
decides whether it's a good idea to do cnfify() --- we don't really
want that to happen when it would cause multiple copies of a subselect
to be generated, I think.