Bug #235 :: Redo SYNC GROUP SIZE logic
 - Start at 1
 - Double upon success, maxxing out based on the value of
   sync_group_maxsize
 - As we restart the remote worker thread upon failure, failure
   resets group size back to 1

This gets rid of complex logic that had the false conceit that we had
any idea as to how long one might expect a SYNC to run, and could
reasonably extrapolate that to estimate long SYNC processing might take.

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=slony1-engine.git;a=commitdiff;h=e0301ce99d8385b592ae5753572f6527fa4c447b

Modified Files
--------------
RELEASE                  |  213 +---------------------------------------------
src/slon/confoptions.c   |   18 +----
src/slon/remote_worker.c |  103 ++++++++--------------
3 files changed, 41 insertions(+), 293 deletions(-)