Raise maximum value of several timeout parameters

Raise maximum value of several timeout parameters

The maximum value of deadlock_timeout, max_standby_archive_delay,
max_standby_streaming_delay, log_min_duration_statement, and
log_autovacuum_min_duration was INT_MAX/1000 milliseconds, which is
about 35min, which is too short for some practical uses.  Raise the
maximum value to INT_MAX; the code that uses the parameters already
supports that just fine.