added FIXME

'backup_copies no' logs 'deleted <filename>'
added notion of master/slave

but it doesn’t do anything yet
check validity of master/slave nodenames
added check for running on the master node
slave nodes get a full copy of the tree

not much rsync filtering needed
documented master/slave config defs
check that I am the master node
don't warn ignored master node
use hostname for param 'master'
this won't happen anymore
tiered setup could make use of slaves
Merge branch 'master_slave' into dev60

Added 'master' and 'slave' definitions
Having an explicit master node is a good thing because synctool 6
copies the synctool commands to all nodes, which basically allowed
running the synctool master command from any node ... not good.
A slave is a node that gets a full copy of the repository. May come
in handy for clusters that have double (or multiple) management
workstations.
did Changelog