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Define DEPRECATION_HEIGHT, clarify that 16 weeks is approximate

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str4d 2018-02-05 01:15:34 +00:00
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@ -45,8 +45,9 @@ implementation or a specific branch of Zcash. [#consensual-currency]_ As such, d
always have the freedom to choose different variants or branches which offer different design trade-offs.
The current Zcash software includes an *auto-senescence* feature, causing nodes running a particular version
to automatically shut down 16 weeks after that version was released. This was implemented for several reasons
[#release-lifecycle]_:
to automatically shut down approximately 16 weeks after that version was released (specifically, at the block
height ``DEPRECATION_HEIGHT`` defined in the source code for that version). This was implemented for several
reasons: [#release-lifecycle]_
- It gives the same systemic advantage of removing old software as auto-upgrade behavior.