am 5e787c42: - add a "isSyncable" flag to a given account/authority pair that   indicates whether or not syncs should be attempted for it. - add public methods to get and set this parameter

Merge commit '5e787c42f2a6b3afc8ec8320a08d51b2d44b8614'

* commit '5e787c42f2a6b3afc8ec8320a08d51b2d44b8614':
  - add a "isSyncable" flag to a given account/authority pair that