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/sa/ike_sa_manager.h

@@ -24,11 +24,11 @@
 #ifndef IKE_SA_MANAGER_H_
 #define IKE_SA_MANAGER_H_
 
+typedef struct ike_sa_manager_t ike_sa_manager_t;
+
 #include <types.h>
 #include <sa/ike_sa.h>
 
-typedef struct ike_sa_manager_t ike_sa_manager_t;
-
 /**
  * @brief The IKE_SA-Manager is responsible for managing all initiated and responded IKE_SA's.
  *