ported parts of two-sim branch

eap_identity parameter to exchange in eap_identity
	some auth_info/peer_cfg refactorings
	fixed some bugs, introduced new ones

src/stroke/stroke_msg.h

@@ -203,6 +203,7 @@ struct stroke_msg_t {
 			int auth_method;
 			u_int32_t eap_type;
 			u_int32_t eap_vendor;
+			char *eap_identity;
 			int mode;
 			int mobike;
 			int force_encap;