Tag appropriate files for rc3

Also performed an initial run through of upgrading our Copyright date to
extend to 2005 ... first run here was very simple ... change everything
where: grep 1996-2004 && the word 'Copyright' ... scanned through the
generated list with 'less' first, and after, to make sure that I only
picked up the right entries ...

to shared memory as soon as possible, ie, right after read_backend_variables.
The effective difference from the original code is that this happens
before instead of after read_nondefault_variables(), which loads GUC
information and is apparently capable of expanding the backend's memory
allocation more than you'd think it should.  This should fix the
failure-to-attach-to-shared-memory reports we've been seeing on Windows.
Also clean up a few bits of unnecessarily grotty EXEC_BACKEND code.

sockets, rather than failing as it formerly did.  Revert the
thereby-obsoleted patch to make psql supply the localhost default.

Per gripe from Josh Berkus.

that is, files are sought in the same directory as the referencing file.
Also allow absolute paths in @file constructs.  Improve documentation
to actually say what is allowed in an included file.

<signal.h>.  Per Andrew Dunstan.

executable file isn't itself a symlink.  We still need to run the
algorithm so that any directory symlinks in the path to the
executable are replaced by a true path.  Noticed this on seeing
pg_config give me a completely wrong answer for --pkglibdir when
I called it through a symlink to the installation bindir.

by Rod Taylor.  The foo_is_visible() functions are relatively slow and
so it pays to check them after checking the name pattern match.

index predicate uses temporary memory for evaluation.  Per example
from Jean-Gerard Pailloncy.

Fixed parsing of defines to make sure they used more than once.

the remainder of the current clog page during system startup.  While
this was a good idea, it turns out the code fails if nextXid is
exactly at a page boundary, because we won't have created the "current"
clog page yet in that case.  Since the page will be correctly zeroed
when we execute the first transaction on it, the solution is just to
do nothing when exactly at a page boundary.  Per trouble report from
Dave Hartwig.

macros, which aren't used anywhere and haven't been for some time.

GetTransactionSnapshot() to ensure ActiveSnapshot advances properly.
Sigh.  Extend regression test so it reveals this error too.

tag files for rc2

bricks shy of a load.

paths of pgstat_init.  Responds to confusion exhibited by Christoph Haller.

when it changes.  Per request from Kris Jurka.

from the child process; fixes observed problems when the returned
version number is '8.0.0' rather than '8.0.0rc1'.  Magnus Hagander

its presence.  This amounts to desupporting Kerberos 5 releases 1.0.*,
which is small loss, and simplifies use of our Kerberos code on platforms
with Red-Hat-style include file layouts.  Per gripe from John Gray and
followup discussion.

advancing ActiveSnapshot when we are inside a volatile function.
Per example from Gaetano Mendola.  Add a regression test to catch
similar problems in future.

after an unknown or failed psql backslash command, and also while
discarding "extra" arguments of a putatively valid backslash command.
In the case of an unknown/failed command, make sure we discard the
whole rest of the line, rather than trying to resume at the next
backslash.  Per discussion with Thomer Gil.

DLL pginstaller installs.