Only attempt to set the encryption-related properties of the outgoing packet's initial header item if we have a key. Related DRY-ness throughout the rest of the method.
Only attempt to set the encryption-related properties of the outgoing packet's initial header item if we have a key. Related DRY-ness throughout the rest of the method.

PersonifyInc/growl,PersonifyInc/growl,PersonifyInc/growl,PersonifyInc/growl,PersonifyInc/growl