pg_dump:  avoid schema qualification for ALTER ... OWNER

We already use search_path to specify the schema, so there is no need
for pg_dump to schema-qualify the name.  Also remove dead code.
9.3 release notes:  move foreign table item

Move item about foreign data wrappers supporting inserts/updates/deletes
to object manipulation.

From Etsuro Fujita
Emit a log message if output is about to be redirected away from stderr.

We've seen multiple cases of people looking at the postmaster's original
stderr output to try to diagnose problems, not realizing/remembering that
their logging configuration is set up to send log messages somewhere else.
This seems particularly likely to happen in prepackaged distributions,
since many packagers patch the code to change the factory-standard logging
configuration to something more in line with their platform conventions.

In hopes of reducing confusion, emit a LOG message about this at the point
in startup where we are about to switch log output away from the original
stderr, providing a pointer to where to look instead.  This message will
appear as the last thing in the original stderr output.  (We might later
also try to emit such link messages when logging parameters are changed
on-the-fly; but that case seems to be both noticeably harder to do nicely,
and much less frequently a problem in practice.)

Per discussion, back-patch to 9.3 but not further.
Update Emacs configuration

Update emacs.samples with new configuration snippets that match pgindent
et al. formatting more accurately and follow Emacs Lisp best practices
better.

Add .dir-locals.el with a subset of that configuration for casual
editing and viewing.

Reviewed-by: Dimitri Fontaine <dimitri@2ndQuadrant.fr>
Reviewed-by: Noah Misch <noah@leadboat.com>
Merge branch 'master' into table_functions
Merge branch 'table_functions' of github.com:davidfetter/returning_before_after into table_functions