pgsql: Fix line end mishandling in pg_upgrade on Windows.

Fix line end mishandling in pg_upgrade on Windows.

pg_upgrade opened the output from pg_dumpall in text mode and
wrote the split files in text mode. This caused unwanted eating
of intended carriage returns on input and production of spurious
carriage returns on output. To avoid this, open all these files
in binary mode. On non-Windows platforms, this change has no
effect.

Backpatch to 9.0. On 9.0 and 9.1, we also switch from redirecting
pg_dumpall's output to using pg_dumpall's -f switch, for the same
reason.

Branch
------
REL9_2_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/5654fd1771398c9f85f91aef53361c96f4eef49c

Modified Files
--------------
contrib/pg_upgrade/dump.c | 12 +++++++++---
1 files changed, 9 insertions(+), 3 deletions(-)