Replication: refactoring of the heartbeat-mechansim; inserted some additional...

Replication: refactoring of the heartbeat-mechansim; inserted some additional debug-messages; fixed a bug that causes loss of participants while parsing the R
replication configuration

git-svn-id: https://babudb.googlecode.com/svn/trunk@261 d4c7dd96-b7b2-11dd-893d-d98698f66bbf