Fine to merge.
Not much acting myself in IMS modules space, but maybe for more flexibility, as a follow up commit, the comparison with `SCTP` can be done case insensitive, to allow both `sctp` or `SCTP` in the xml config. This because I noticed something similar for a node name:
- https://github.com/kamailio/kamailio/pull/3327/commits/72801e2bc6fddd56c4ab0...