pg_upgrade: fix CopyFile() on Windows to fail on file existence
Also fix getErrorText() to return the right error string on failure.
This behavior now matches that of other operating systems.
Report by Noah Misch
Backpatch through 9.1
Branch
------
REL9_3_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/6638c9aaf881b156fafc05371e8ed21f0cdda66e
Modified Files
--------------
contrib/pg_upgrade/file.c | 2 +-
contrib/pg_upgrade/util.c | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)