Backpatch pg_upgrade fixes to 9.0:
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.
TESTING (r220.127.116.11 -> r18.104.22.168)
check.c (r1.11 -> r22.214.171.124)
exec.c (r1.8 -> r126.96.36.199)
file.c (r188.8.131.52 -> r184.108.40.206)
option.c (r1.12 -> r220.127.116.11)
pg_upgrade.c (r1.10 -> r18.104.22.168)
server.c (r1.8 -> r22.214.171.124)