[ksk-rollover] 15 days into the add-hold for KSK-2017

Wanted to "mark the occasion" and ask if there are any further concerns? RFC-5011 following servers ought to be about halfway to trusting KSK-2017 about this day, with the add-hold expiring around August 11, give or take time zones and when probing happened. That's halfway to "trusting" the key. There's still 2.5 more months (October 11) until signatures by KSK-2017 appear.