Comment 6 for bug 1437862

This bug prevents me upgrading from 9.5 -> 9.6.

I tried both workarounds suggested above:
Edited /usr/bin/pg_upgradecluster changing lines 333 and 354 of that script from:
  push @argv, ('-t', '5') if $version >= '8.4';
to
  push @argv, ('-t', '30') if $version >= '8.4';
which was my guessed change based on comment #4 above: the posted link is broken.
I re-ran pg_upgradecluster but it crashed with the same error, and within less than a second of starting which suggests to me this isn't a timeout issue in my case.

Also checked my postgresql.conf file IAW comment #5 above, my port line was already uncommented.