Null sdp in un-holding re-invite (bug 0014385?)

What is the design intent of Asterisk when it receives a re-invite with no SDP? Bug 14385 seems to focus on this point, but I can’t tell clearly determine the design intent from the bug chatter.

Broadsoft, cisco, and others use such a re-invite to solicit media capabilities, such as when taking a call off hold. This signaling functions in this manner when sent to large SIP carriers as well, so there seems to be fairly wide support of this paradigm.

A requirement to handle this signaling was mentioned in, but did not make it into 05 or subsequent docs.

Is it the intent of the asterisk developers to view a re-invite with null SDP as a capability solicitation and to respond to such a packet with an SDP offer containing all media capabilities?