Pubish msc_compl_l3() decl in new file libmsc/msc_api.h (but see comment).
Call msc_compl_l3() when establishing a subscriber connection for IuCS.
Remove bts from subscr_conn_allocate_iu() signature, use network, link_id and
conn_id instead.
Move subscr_conn_allocate_iu() to the top of the file, because it semantically
belongs before subscr_conn_lookup_iu().