correctly sized and expand comment to explain otherwise
undocumented use of replication connection parameter.

present since 8.0 was never fully meaningful, since two recovery targets
cannot be specified. Refactor recovery target type to make this change
and associated code easier to understand. No change in function.

Bug report arising from internal support question.

field into WAL record and reset it from there, rather than using
FrozenTransactionId which can lead to some corner case bugs.

Problem report and suggested route to a fix from Heikki, details by me.

with a few strategically placed pg_verifymbstr calls.

Also make a couple other minor editorial improvements.

In PLy_spi_execute_plan, use the data-type specific Python-to-PostgreSQL
conversion function instead of passing everything through InputFunctionCall
as a string.  The equivalent fix was already done months ago for function
parameters and return values, but this other gateway between Python and
PostgreSQL was apparently forgotten.  As a result, data types that need
special treatment, such as bytea, would misbehave when used with
plpy.execute.

in recovery_end_command, it always came out as 0 because InRedo was
cleared before recovery_end_command was executed. Also, always take
ControlFileLock when reading checkpoint location for %r.

The recovery_end_command bug and the missing locking was present in 8.4
as well, that part of this patch will be backported separately.

This variable is apparently only for Python internally.  In newer releases
of Python this variable pulls in more and more libraries that users are
less likely to have, leading to potential build failures.

Fujii Masao

to transformAggregateCall, instead of abusing fields in Aggref to carry them
temporarily.  No change in functionality but hopefully the code is a bit
clearer now.  Per gripe from Gokulakannan Somasundaram.

Also fix and uncomment an old example of creating a GIST index, and make
a couple of other minor editorial adjustments.

the master is still in recovery. We don't support cascading slaves yet.

Patch by Fujii Masao, with slightly changed wording.

correct, as described in comments at start of xlog.c

Jaime Casanova

Add ERRCODE_INVALID_PASSWORD sqlstate error code.

In particular, the assertion that shmall is sufficiently sized by default
is slowly becoming untrue.

by Dan O'Hara.

Patch by Teodor Sigaev

unable to read a stats file for reasons other than ENOENT, and having to reset
last_statrequest because it's later than current time in the collector.
Not clear if this will shed any light on the "pgstat wait timeout" business,
but it seems like a good idea in general.

In passing, do some message-style-police work on recently-added
pgstat_reset_shared_counters code.

properly; it's been making that comment uglier with each run.

This resulted in useless extra work during every call of parseRelOptions,
but no bad effects other than that.  Noted by Alvaro.