Store allowed NSSAIs from NAS message

Request default PDU session with first NSSAI from the list

executables/nr-uesoftmodem.c

@@ -100,6 +100,7 @@ pthread_cond_t sync_cond;
 pthread_mutex_t sync_mutex;
 int sync_var=-1; //!< protected by mutex \ref sync_mutex.
 int config_sync_var=-1;
+nr_nas_msg_snssai_t nas_allowed_nssai[8];
 
 // not used in UE
 instance_t CUuniqInstance=0;