* libmsc/gsm_09_11.c: properly handle OSMO_GSUP_MSGT_PROC_SS_ERROR
* libmsc/gsm_09_11.c: inform HLR/EUSE if Paging has failed
* libmsc/msc_net_init.c: pass pointer to gsm_network directly
* libmsc/gsm_09_11.c: drop meaningless check for concurrent paging
* libmsc/gsm_09_11.c: drop rudimentary vsub->cgi.lai.lac check
* libmsc/gsm_09_11.c: log network-originated session establishment error
* libmsc/gsm_09_11.c: do not abuse LOG_TRANS() and early trans allocation