In VPATH builds, the build directory was not being searched for files in
GETTEXT_FILES, leading to failure to construct the .pot files.  This has
bit me all along, but never hard enough to get it fixed; I suppose not a
lot of people uses VPATH and NLS-enabled builds, and those that do,
don't do "make update-po" often.

This is a longstanding problem, so backpatch all the way back.

With this in place, a session blocking behind another one because of
tuple locks will get a context line mentioning the relation name, tuple
TID, and operation being done on tuple.  For example:

LOG:  process 11367 still waiting for ShareLock on transaction 717 after 1000.108 ms
DETAIL:  Process holding the lock: 11366. Wait queue: 11367.
CONTEXT:  while updating tuple (0,2) in relation "foo"
STATEMENT:  UPDATE foo SET value = 3;

Most usefully, the new line is displayed by log entries due to
log_lock_waits, although of course it will be printed by any other log
message as well.

Author: Christian Kruse, some tweaks by Álvaro Herrera
Reviewed-by: Amit Kapila, Andres Freund, Tom Lane, Robert Haas

make maintainer-check was obscure and rarely called in practice, and
many breakages were missed.  Fold everything that make maintainer-check
used to do into the normal build.  Specifically:

- Call duplicate_oids when genbki.pl is called.

- Check for tabs in SGML files when the documentation is built.

- Run msgfmt with the -c option during the regular build.  Add an
  additional configure check to see whether we are using the GNU
  version.  (make maintainer-check probably used to fail with non-GNU
  msgfmt.)

Keep maintainer-check as around as phony target for the time being in
case anyone is calling it.  But it won't do anything anymore.

It provides some additional help to translators.

Josh Kupershmidt

Since xgettext provides options to do this now, we might as well use
them.

The option --no-wrap prevents wars with (most?) editors about proper
line wrapping.  --sort-by-file ensures consistent file order, for
easier diffing.

Use msgmerge --lang option to seed the Language field, recently
introduced by gettext, in the header of the new PO file.

The intent is to allow configure --enable-nls=xx for installation
speed and size, but have maintainer-check check all source files
regardless.

That way, the result of a msgmerge is more deterministic and not
dependent on the order in which the files are found.

The --flag argument can be used to tell xgettext the arguments of
which functions should be flagged with c-format in the PO files,
instead of guessing based on the presence of format specifiers, which
fails if no format specifiers are present but the translation
accidentally introduces one.

Appropriate flag settings have been added for each message catalog.

based on a patch by Christoph Berg for bug #6066

Put gettext trigger words that are common to the backend and backend
modules into a makefile variable to include everywhere, to avoid
error-prone repetitions.

Since it's globally defined in c.h, it should be treated as a gettext
trigger everywhere.

xgettext is only required when make init-po is run manually; it is not
required for a build.  The intent to handle that was already there, but
the ifdef's were in the wrong place.

mkinstalldirs used to handle no arguments, but mkdir doesn't.

Also remove the .SILENT setting, that was previously removed from
Makefile.global as well.

Update install-sh to that from Autoconf 2.63, plus our Darwin-specific
changes (which I simplified a bit).  install-sh is now able to install
multiple files in one run, so we could simplify our makefiles sometime.

install-sh also now has a -d option to create directories, so we don't need
mkinstalldirs anymore.

Use AC_PROG_MKDIR_P in configure.in, so we can use mkdir -p when available
instead of install-sh -d.  For consistency with the rest of the world,
the corresponding make variable has been renamed from $(mkinstalldirs) to
$(MKDIR_P).

instead.

file or trigger function lists are changed.

like a makefile with real dependencies.

Instead of overwriting the old po file, write the new one to .po.new.  This is
less annoying and integrates better with the NLS web site.

Also, we can now merge languages that don't have a po file yet, by merging
against all other po files of that language, to pick up recurring translations
automatically.  This previously only worked when a po file already existed.

to the gettext domain name, to simplify parallel installations.

Also, rename set_text_domain() to pg_bindtextdomain(), because that is what
it does.

files of the same languages.  That way, similar or equal translations in
different programs are automatically propagated and the life of translators
becomes a little bit easier.

$Header: -> $PostgreSQL Changes ...

strings in the backend, so that .l and .y files are included.  To that end,
don't make the .pot file a prerequisite on distprep.

absolute paths of the source tree in the po files.  Also, run msgfmt with
-c option in maintainer-check.

Use --enable-nls to turn it on; see installation instructions for details.
See developer's guide how to make use of it in programs and how to add
translations.

psql sources have been almost fully prepared and an incomplete German
translation has been provided.  In the backend, only elog() calls are
currently translatable, and the provided German translation file is more
of a placeholder.