Bug 255.
Changes for 9.1 to avoid pivot conflicts.

specify SERIALIZABLE for read only deferred transactions.
Make remote_worker calls to the provider read-only deferred
Make remote_worker calls on the local con READ COMMITTED.
Make the remote listener run in a READ ONLY DEFERRED transaction on

Based on a patch by Simon Riggs.

Branch
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REL_2_0_STABLE

Details
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http://git.postgresql.org/gitweb?p=slony1-engine.git;a=commitdiff;h=e689d4fa5f1b4b0eeb9e3f2061b8ba29e5729bb7

Modified Files
--------------
RELEASE                  |    4 +++-
src/slon/remote_listen.c |   46 ++++++++++++++++++++++++++++++++++++++++++++++
src/slon/remote_worker.c |   18 +++++++++++-------
3 files changed, 60 insertions(+), 8 deletions(-)