I upgraded my iphone to ios9 and now cannot access my email on plan9 - no sniggering at the back.
It seems apple require 1024bit keys for Diffe helman exchanges in TLS, and DH + RSA is no longer sypported at all. Primarly this is a warning to 9fans about the perils of ios9 and a vain hope that somone might be looking at modifying libsec. -Steve