moved typedefs to beginning of files to solve some include problems

splitted authenticator to have a separate implementation for each auth_method_t
using va_copy to clone va_lists, should fix proplems on AMD64
some other cleanups

src/charon/encoding/payloads/traffic_selector_substructure.h

@@ -25,6 +25,8 @@
 #ifndef TRAFFIC_SELECTOR_SUBSTRUCTURE_H_
 #define TRAFFIC_SELECTOR_SUBSTRUCTURE_H_
 
+typedef struct traffic_selector_substructure_t traffic_selector_substructure_t;
+
 #include <types.h>
 #include <encoding/payloads/payload.h>
 #include <utils/host.h>
@@ -37,8 +39,6 @@
  */
 #define TRAFFIC_SELECTOR_HEADER_LENGTH 8
 
-typedef struct traffic_selector_substructure_t traffic_selector_substructure_t;
-
 /**
  * @brief Class representing an IKEv2 TRAFFIC SELECTOR.
  *