Clean up temp installations after client program tests.

Commit 7d0f493f19607774fdccb1a1ea06fdd96a3d9698 added infrastructure
to perform tests in assorted src/bin/ subdirectories, but forgot to
teach "make clean" to clean up the detritus the tests leave behind.
Fix off-by-one bug in LWLockRegisterTranche().

Original coding failed to enlarge the array as required if
the requested tranche_id was equal to LWLockTranchesAllocated.

In passing, fix poor style of not casting the result of (re)palloc.
Record the proper typmod for an index expression column.

We should use exprTypmod() to extract the typmod of the expression,
instead of just blindly storing -1.  This seems to have been an aboriginal
oversight in commit fc8d970cbcdd6f025475822a4cf01dfda0873226 which
introduced general-expression indexes.  The consequences are only cosmetic
at present, since the index machinery doesn't really look at typmod for
index columns; but still it seems best to describe the column type as
precisely as we can.  Per off-list complaint from Thomas Fanghaenel.
Don't #include utils/palloc.h in common/fe_memutils.h.

This breaks the principle that common/ ought not depend on anything in the
server, not only code-wise but in the headers.  The only arguable advantage
is avoidance of duplication of half a dozen extern declarations, and even
that is rather dubious, considering that the previous coding was wrong
about which declarations to duplicate: it exposed pnstrdup() to frontend
code even though no such function is provided in fe_memutils.c.

On the same principle, don't #include utils/memutils.h in the frontend
build of psprintf.c.  This requires duplicating the definition of
MaxAllocSize, but that seems fine to me: there's no a-priori reason why
frontend code should use the same size limit as the backend anyway.

In passing, clean up some rather odd layout and ordering choices that
were imposed on palloc.h to reduce the number of #ifdefs required by
the previous approach.

Per gripe from Christoph Berg.  There's still more work to do to make
include/common/ clean, but this part seems reasonably noncontroversial.
Improve generation algorithm for database system identifier.

As noted some time ago, the original coding had a typo ("|" for "^")
that made the result less unique than intended.  Even the intended
behavior is obsolete since it was based on wanting to produce a
usable value even if we didn't have int64 arithmetic --- a limitation
we stopped supporting years ago.  Instead, let's redefine the system
identifier as tv_sec in the upper 32 bits (same as before), tv_usec
in the next 20 bits, and the low 12 bits of getpid() in the remaining
bits.  This is still hardly guaranteed-universally-unique, but it's
noticeably better than before.  Per my proposal at
<29019.1374535940@sss.pgh.pa.us>
Can't completely get rid of #ifndef FRONTEND in palloc.h :-(

pg_controldata includes postgres.h not postgres_fe.h, so utils/palloc.h
must be able to compile in a "#define FRONTEND" context.  It appears that
Solaris Studio is smart enough to persuade us to define PG_USE_INLINE,
but not smart enough to not make a copy of unreferenced static functions;
which leads to an unsatisfied reference to CurrentMemoryContext.  So we
need an #ifndef FRONTEND around that declaration.  Per buildfarm.
Minor fixes for ALTER TABLE documentation.

Etsuro Fujita
Fix two bugs in WAL-logging of GIN pending-list pages.

In writeListPage, never take a full-page image of the page, because we
have all the information required to re-initialize in the WAL record
anyway. Before this fix, a full-page image was always generated, unless
full_page_writes=off, because when the page is initialized its LSN is
always 0. In stable-branches, keep the code to restore the backup blocks
if they exist, in case that the WAL is generated with an older minor
version, but in master Assert that there are no full-page images.

In the redo routine, add missing "off++". Otherwise the tuples are added
to the page in reverse order. That happens to be harmless because we
always scan and remove all the tuples together, but it was clearly wrong.
Also, it was masked by the first bug unless full_page_writes=off, because
the page was always restored from a full-page image.

Backpatch to all supported versions.
Add support for wrapping to psql's "extended" mode. This makes it very
feasible to display tables that have both many columns and some large
data in some columns (such as pg_stats).

Emre Hasegeli with review and rewriting from Sergey Muraviov and
reviewed by Greg Stark
Remove unnecessary cast causing a warning

Incidentally, I reversed the two names in the earlier commit. The
original author was Sergey Muraviov and the reviewer was Emre
Hasegeli.
Improve planner to drop constant-NULL inputs of AND/OR where it's legal.

In general we can't discard constant-NULL inputs, since they could change
the result of the AND/OR to be NULL.  But at top level of WHERE, we do not
need to distinguish a NULL result from a FALSE result, so it's okay to
treat NULL as FALSE and then simplify AND/OR accordingly.

This is a very ancient oversight, but in 9.2 and later it can lead to
failure to optimize queries that previous releases did optimize, as a
result of more aggressive parameter substitution rules making it possible
to reduce more subexpressions to NULL constants.  This is the root cause of
bug #10171 from Arnold Scheffler.  We could alternatively have fixed that
by teaching orclauses.c to ignore constant-NULL OR arms, but it seems
better to get rid of them globally.

I resisted the temptation to back-patch this change into all active
branches, but it seems appropriate to back-patch as far as 9.2 so that
there will not be performance regressions of the kind shown in this bug.
Fix whitespace
PL/Python: Adjust the regression tests for Python 3.4

The error test case in the plpython_do test resulted in a slightly
different error message with Python 3.4.  So pick a different way to
test it that avoids that and is perhaps also a bit clearer.
Add missing SYSTEMQUOTEs

Some popen() calls were missing SYSTEMQUOTEs, which caused initdb and
pg_upgrade to fail on Windows, if the installation path contained both
spaces and @ signs.

Patch by Nikhil Deshpande. Backpatch to all supported versions.
merge master