Change in libosmo-sccp[master]: Add selector for ANSI or ITU variant

From Arran Cudbard-bell a.cudbardb@freeradius.org:

Arran Cudbard-bell has posted comments on this change.

Change subject: Add selector for ANSI or ITU variant ......................................................................

Patch Set 1:

This is for initial review. Wouldn't expect this to be merged as is (needs tests for a start).

More to get feedback on whether ANSI support is desired. In the project we're doing currently it is. I have similar patches for the MTP3 layer in osmobsc, but there needs to be more discussion around that.