D. Hugh Redelmeier hugh at mimosa.com
Tue Sep 12 19:33:00 UTC 2017

This name is misleading.  It isn't the value of a hash algorithm.  It is 
the number of octets in the representation of the hash algorithm 
designator in the Notify Payload.

It is great to make this length symbolic but this symbol isn't used in 
important ways in the code.  For example u_int16_t and htons() are used, 
wiring in the length 2.

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