Here's a new series of patches for the parallel dump/restore. They need to be
applied on top of each other.
The parallel pg_dump patch does not yet use the synchronized snapshot
functionality from my other patch to not create more dependencies than
necessary.
(1) pg_dump directory archive format (without checks as requested by Heikki)
(2) parallel pg_dump
(3) checks for the directory archive format
Joachim
