Backpatch to 9.0.X.

It isn't, now that we ship the docs as loose files rather than a sub-tarball.

Also adjust the wording in a couple of places to make the lists of required
software read more consistently.

- remove excessive table cells
- moving function parameters into function tags rather than having
  them being considered separate
- add return type column on XML2 contrib module functions list and
  removing return types from function
- add table header to XML2 contrib parameter table

Thom Brown

Backpatch to 9.0.X.

Since the code underlying pg_get_expr() is not secure against malformed
input, and can't practically be made so, we need to prevent miscreants
from feeding arbitrary data to it.  We can do this securely by declaring
pg_get_expr() to take a new datatype "pg_node_tree" and declaring the
system catalog columns that hold nodeToString output to be of that type.
There is no way at SQL level to create a non-null value of type pg_node_tree.
Since the backend-internal operations that fill those catalog columns
operate below the SQL level, they are oblivious to the datatype relabeling
and don't need any changes.

Per KOIZUMI Satoru.

type.  Per KOIZUMI Satoru.

Per discussion.

and contains operators.

Spotted by Dmitriy Igrishin.  Back-patch to 8.2, which is when the PREPARE
statement was improved to allow parameter types to be omitted.

which is perhaps not a terribly good spot for it but there doesn't seem to be
a better place.  Also add a source-code comment pointing out a couple reasons
for having a separate lock file.  Per suggestion from Greg Smith.

of constraints.

Kevin Grittner

questionable reliability;  information moved to a wiki:

	http://wiki.postgresql.org/wiki/Incrementally_Updated_Backups

Backpatch to 9.0.

While at it, copy-edit the description of prefix-match marker support in
synonym dictionaries, and clarify the description of the default unaccent
dictionary a bit more.

Note: as usual, bug fixes that were also applied in back branches are not
considered material to include in a new major release's notes.

Backpatch to 9.0.X.

Josh Berkus

default is low because of pg_clog file removal.

Backpatch to 9.0.X.

Pavel Stehule, reviewed by me.

This is mostly about grammar, style, and presentation, though I did find
a few small factual errors.

We already mentioned xid wraparound.

Per Thom Brown.

Per gripe from Fujii Masao, though this is not exactly his proposed patch.
Categorize as DEVELOPER_OPTIONS and set context PGC_SIGHUP, as per Fujii,
but set the default to LOG because higher values aren't really sensible
(see the code for trace_recovery()).  Fix the documentation to agree with
the code and to try to explain what the variable actually does.  Get rid
of no-op calls trace_recovery(LOG), which accomplish nothing except to
demonstrate that this option confuses even its author.

at end of files.

Boszormenyi Zoltan.

Robert Haas, per gripe from Erik Rijkers

Kevin Grittner, with markup adjustments.

look at a function but don't wish to fire up an editor.

Pavel Stehule, reviewed by Jan Urbanski