mnot/I-D — pull request #57 by martinthomson (2014-05-22 15:42:22+00:00)
Title: Removing suggested maximum, in line with HSTS

Will asked why the suggestion for a month. HPKP uses 60 days and this seems like an inherently safer mechanism than that. ekr suggests the order from most to least dangerous is: HPKP, HSTS, this; at least in terms of the risk of screwing something up.

So this removes the suggested maximum.