wrong answer, as has been seen to occur with a buggy Linux kernel.  Not
really our bug, but it's a simple test in a seldom-used control path,
so might as well have a defense.

for DROP AGGREGATE IF EXISTS.  Per report from Teodor.

make fopen work safely on Windows.  Magnus

'postmaster', so as not to depend on the existence of the postmaster
symlink.  Also, implement postmaster-still-alive and postmaster-kill
operations for Windows, per Magnus.

Tag us Beta1

backward compatibility for anyone using the old userlock code that's now
on pgfoundry --- locks from that code still show as 'userlock'.

return true for exactly the characters treated as whitespace by their flex
scanners.  Per report from Victor Snezhko and subsequent investigation.

Also fix a passel of unsafe usages of <ctype.h> functions, that is, ye olde
char-vs-unsigned-char issue.  I won't miss <ctype.h> when we are finally
able to stop using it.

(possibly (un)translated) letters that are actually expected as input.
Also reject invalid responses instead of silenty taken them as "no".

with help from Bernd Helmle

match what SHOW displays as default value, to make the user experience
uniform.

giving tables of known timezone names, refer the user to the system views.
Joachim Wieland

Add URL's to mention proper entity lists.

not in the character set supported by DocBook nor standard HTML.  (Sorry
Volkan.)  Also replace random character-set references by a pointer to
the actual standard.

even when a single relation requires more than max_fsm_pages pages.  Also,
make VACUUM emit a warning in this case, since it likely means that VACUUM
FULL or other drastic corrective measure is needed.  Per reports from Jeff
Frost and others of unexpected changes in the claimed max_fsm_pages need.

>   http://archives.postgresql.org/pgsql-hackers/2006-09/msg01681.php

is a large enough histogram, it will use the number of matches in the
histogram to derive a selectivity estimate, rather than the admittedly
pretty bogus heuristics involving examining the pattern contents.  I set
'large enough' at 100, but perhaps we should change that later.  Also
apply the same technique in contrib/ltree's <@ and @> estimator.  Per
discussion with Stefan Kaltenbrunner and Matteo Beccati.

Alvaro.

Laurenz Albe

Stark, additional fixes and editorialization by Neil Conway. Greg's patch
description:

    Some more doc patches for partitioned tables. In particular replace
    the caveat that INCLUDING CONSTRAINTS doesn't exist and replace it
    with documentation of, well, INCLUDING CONSTRAINTS.

    Also, there was an instance of "LIKE WITH DEFAULTS" which is
    actually spelled "LIKE INCLUDING DEFAULTS".

tables in the query compete for cache space, not just the one we are
currently costing an indexscan for.  This seems more realistic, and it
definitely will help in examples recently exhibited by Stefan
Kaltenbrunner.  To get the total size of all the tables involved, we must
tweak the handling of 'append relations' a bit --- formerly we looked up
information about the child tables on-the-fly during set_append_rel_pathlist,
but it needs to be done before we start doing any cost estimation, so
push it into the add_base_rels_to_query scan.

grammatical errors, improve the description of some new features.