descriptor handling

OpenSSL libraries --- just don't call them if they're not there.  This
might possibly lead to misleading error messages, but we'll just have
to live with that.

This fixes potential crashes on old versions of OpenSSL and the requirement on
"Applink" in new versions when building with MSVC and using different
runtimes.

Dave Page with fixes from me.

compiler --- at least on ARM, it does.  I suspect that the varvarlena patch
has been creating larger-than-intended toast pointers all along on ARM,
but it wasn't exposed until the latest tweak added some Asserts that
calculated the expected size in a different way.  We could probably have
fixed this by adding __attribute__((packed)) as is done for ItemPointerData,
but struct varattrib_pointer isn't really all that useful anyway, so it
seems cleanest to just get rid of it and have only struct varattrib_1b_e.
Per results from buildfarm member quagga.

Hiroshi Saito

Hannes Eder

explicitly.  This means a TOAST pointer takes 18 bytes instead of 17 --- still
smaller than in 8.2 --- which seems a good tradeoff to ensure we won't have
painted ourselves into a corner if we want to support multiple types of TOAST
pointer later on.  Per discussion with Greg Stark.

ITAGAKI Takahiro's patch.

while the restore_command does its thing, then 'recovering XXX' while
processing the segment file.  These operations are heavyweight enough
that an extra PS display set shouldn't bother anyone.

testing).  Combine the formerly independent opclasses for the various
ISN types into opfamilies.  The latter causes some extra bleating from
opr_sanity, since the module doesn't provide complete sets of cross-type
operators, but it's still a good idea because it will give the planner
more information to work with.  The missing cross-type operators no longer
pose a risk of unexpected planner errors in 8.3, so there's no need to
insist on filling them in (and I gather it wouldn't be very sound
semantically to add them all).

Found by running opr_sanity on contrib modules.

to get memory allocation thread-safe. He also did some cleaning up.

Found by running opr_sanity on contrib modules.

Found by running opr_sanity on contrib modules.

Found by running opr_sanity on contrib modules.

Found by running opr_sanity on contrib modules.

any commutator operator for =(chkpass,text), so this was creating a
shell operator that would fail on use.  Found by opr_sanity testing.

Found by running opr_sanity on contrib modules.

process' PS display.  After a suggestion by Simon (not exactly his
patch though).

CREATE INDEX CONCURRENTLY).  Such an index might not have entries for every
heap row and thus clustering with it would result in silent data loss.
The scenario requires a pretty foolish DBA, but still ...

ALTER TABLE on a composite type or ALTER TYPE on a table's rowtype.
We already rejected these cases, but the error messages were a bit
random and didn't always provide a HINT to use the other command type.

numbering for additional functions.

buildfarm failures.

which is the case at least on some Solaris versions.  Marko Kreen

recovery stop time was used.  This avoids a corner-case risk of trying to
overwrite an existing archived copy of the last WAL segment, and seems
simpler and cleaner all around than the original definition.  Per example
from Jon Colverson and subsequent analysis by Simon.

cannot support.

since this will allow initdb to reject attempts to initdb in a locale
that uses such an encoding.  We'll probably find out more such names
during beta ...

means UTF-8.  Per examination of /usr/share/locale in 10.4.10.

 * We can only fix this with Tcl >= 8.4, when Tcl_SetNotifier()

databases with encodings that are incompatible with the server's LC_CTYPE
locale, when we can determine that (which we can on most modern platforms,
I believe).  C/POSIX locale is compatible with all encodings, of course,
so there is still some usefulness to CREATE DATABASE's ENCODING option,
but this will insulate us against all sorts of recurring complaints
caused by mismatched settings.

I moved initdb's existing LC_CTYPE-to-encoding mapping knowledge into
a new src/port/ file so it could be shared by CREATE DATABASE.

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