Rephrase part of the replicator documentation
Rephrase part of the replicator documentation

This tries to make the replicator documentation's "Delegations" section
more clear and easier to read.

fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb