[M] Change in libosmo-sigtran[master]: Pass ownership of Tx xua_msg down the stack [1/2]

Attention is currently required from: daniel, fixeria, laforge, osmith.

pespin has posted comments on this change by pespin. ( https://gerrit.osmocom.org/c/libosmo-sigtran/+/39396?usp=email )

Change subject: Pass ownership of Tx xua_msg down the stack [1/2] ......................................................................

Patch Set 2:

(1 comment)

Patchset:

PS2:

I'll have to look at this kind of architectural change *very* carefully and after tring to meditate […]

Yes hence why I'm submitting these patches ahead of time while I'm still finishing implementing later steps. I have been investing quite some time looking at the code now and I ended up with the decision that this was the best idea. And once this is in place, suddenly evertyhing becomes a lot clearer when trying to implement ASP loadsharing, together with the related AS lodsharing I already implemented.

TTCN3 STP_Tests are passing fine with these patches applied btw.