lock the target relation just once per SQL function call.  The original coding
obtained and released lock several times per call.  Aside from saving a
not-insignificant number of cycles, this eliminates possible race conditions
if someone tries to modify the relation's schema concurrently.  Also
centralize locking and permission-checking logic.

Problem noted while investigating a trouble report from Robert Voinea --- his
problem is still to be fixed, though.

standalone utility for removing files from archive.

than in a subdirectory of the $HOME directory, or $TMP in Windows.

when connection string is longer than NAMEDATALEN.
The previous fix for long connection name broke the behavior.

end with "duplicate connection name" errors.

Backported to release 7.4.

Now long names are adjusted with truncate_identifier() and NOTICE messages
are raised if names are actually truncated.

Backported to release 8.0.

for pg_migrator, per suggestion from Magnus.

in their display of command-line options with other client applications.

proper default username.

its sole caller does that too.  Jan Matousek, via Pavel Stehule

comparing the same column to multiple values.

match the behavior of autovacuum, which does this as the xid advances
even if autovacuum is turned off.

hardcoding a 'template0' check, per suggestion from Alvaro.

This might fix a problem where someone has allowed 'template0'
connections, but it is a cleaner approach even if doesn't fix the
bug.

Modify path separators for Win32.

Per ideas from Takahiro Itagaki

EDB must maintain their own patch set for this.

Should fix buildfarm failures.

* There is no chmod() on Windows.
* Must always use the 3-parameter version of open()
* There is no dynloader.h - but it also appears unnecessary on all platforms
* Don't include shlobj.h because it causes compile errors, and from what I can
  see it's not actually used. This may need to be added back for mingw
  and/or cygwin in the worst case.

(pg_upgrade_support).

on the buildfarm.

cmp parameter for pg_scandir().  The code failed to support this anyway
for Sun/Windows, so pretending we could accept a parameter other than
NULL was just asking for trouble.

Add PGAPPICON to all executable makefiles.