sgsn_libgtp.c: Drop use of deprecated libgtp APIs gtp_retrans*()
Since osmo-ggsn.git c94837c6a401bf0f80791b619a9b4cfbe9160afd, those
APIs are a no-op since timers are tracked internally through osmocom
APIs (and at the same time, new implementation fixes some timing related
bugs).
As a result, osmo-sgsn depends now on at least that libgtp commit. Since
it's not yet avaiable on latest libgtp release, let's track it down in
TODO-RELESE to not forget to update libgtp requirements during osmo-sgsn
release.
Related: OS#4178
Change-Id: Ia9a93d4a6ed63cd0c736f9a99d81d730b958d82e
diff --git a/TODO-RELEASE b/TODO-RELEASE
index 1c5d61f..ac6dcb2 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -1 +1,4 @@
#component what description / commit summary line
+osmo-sgsn libgtp We dropped libgtp gtp_retranstimeout timer code which became a
+ no-op in osmo-ggsn.git c94837c6a401bf0f80791b619a9b4cfbe9160afd,
+ which means next osmo-sgsn release will require libgtp > 1.4.0.