Process.alive? and Process.monitor can cause freezing

[derekkraan]

These function calls (and perhaps others) can cause freezing in a netsplit scenario. A possible solution is to move synchronization to separate processes (one per neighbour perhaps, so that one neighbour's netsplit doesn't cause problems for synchronization to other neighbours) so that we can isolate the impact of a slow call to a netsplitted neighbour.

CC @frekw