Bug 345

The strtok_r on the node list was adding replacing the comma
with a NULL causing only 1 node to get inserted into sl_event.
This mean any nodes that where cascaded only saw 1 of the nodes
in the drop node list.

Call strtok_r on a copy of the list so it can safely be munged.

Also add in a DropNode cluster test to demonstrate test this issue

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=slony1-engine.git;a=commitdiff;h=33a2da34bb5243309788bdd1b51b12b53c0b5214

Modified Files
--------------
clustertest/disorder/tests/DropNode.js       |   86 ++++++++++++++++++++++++++
clustertest/disorder/tests/disorder_tests.js |    2 +
src/slon/remote_worker.c                     |    5 +-
3 files changed, 91 insertions(+), 2 deletions(-)