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/threads/kernel_interface.h

@@ -25,12 +25,14 @@
 #ifndef KERNEL_INTERFACE_H_
 #define KERNEL_INTERFACE_H_
 
+typedef struct natt_conf_t natt_conf_t;
+typedef enum policy_dir_t policy_dir_t;
+typedef struct kernel_interface_t kernel_interface_t;
+
 #include <utils/host.h>
 #include <crypto/prf_plus.h>
 #include <encoding/payloads/proposal_substructure.h>
 
-typedef struct natt_conf_t natt_conf_t;
-
 /**
  * Configuration for NAT-T
  */
@@ -41,8 +43,6 @@ struct natt_conf_t {
 	u_int16_t dport;
 };
 
-typedef enum policy_dir_t policy_dir_t;
-
 /**
  * Direction of a policy. These are equal to those
  * defined in xfrm.h, but we want to stay implementation
@@ -57,8 +57,6 @@ enum policy_dir_t {
 	POLICY_FWD = 2,
 };
 
-typedef struct kernel_interface_t kernel_interface_t;
-
 /**
  * @brief Interface to the kernel.
  *