Update line count totals for psql help displays.

Update line count totals for psql help displays.

As usual, we've been pretty awful about maintaining these counts.
They're not all that critical, perhaps, but let's get them right
at release time.  Also fix 9.5, which I notice is just as bad.
It's probably wrong further back, but the lack of --help=foo
options before 9.5 makes it too painful to count.