Important changes:
- The 'isync' compatibility wrapper was removed.
- The Master/Slave configuration keywords where deprecated and should be
replaced with Far/Near. All users should update their configuration
file accordingly. It's a trivial change and the old Master/Slave
keywords will still work for now but result in the following message:
Notice: Master/Slave are deprecated; use Far/Near instead.
Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
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