In pg_upgrade, prevent psql AUTOCOMMIT=off by not loading .psqlrc.
In pg_upgrade, report /bin directory checks independent of /data checks.
Remove incorrect email address for pg_upgrade bug reports.
On Win32, pg_upgrade cannot sent any server log output to the log file
because of file access limitations on that platform.
* There is no chmod() on Windows.
* Must always use the 3-parameter version of open()
* There is no dynloader.h - but it also appears unnecessary on all platforms
* Don't include shlobj.h because it causes compile errors, and from what I can
see it's not actually used. This may need to be added back for mingw
and/or cygwin in the worst case.
