[Jingle] Negotiation of SRTP in XEP-0167

[Paul Witty]

XEP-0167 states:
"When the responder receives a session-initiate message containing an 
<encryption/> element, the responder MUST either (1) accept the offer by 
denoting one of the <crypto/> elements as acceptable (it does this by 
mirroring that <crypto/> element in its session acceptance) or (2) 
reject the offer by sending a session-terminate message with a Jingle 
reason of <security-error/> (typically with an RTP-specific condition of 
<invalid-crypto/>)."
However, this is only true when encryption is required, as otherwise it 
also has the option of responding without any encryption.

Additionally, example 7 looks to be a copy of example 6, when it should 
be a message in the other direction (from romeo at montague.lit/orchard to 
juliet at capulet.lit/balcony).

-- 

Paul