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/libstrongswan/crypto/x509.h

@@ -23,6 +23,8 @@
 #ifndef X509_H_
 #define X509_H_
 
+typedef struct x509_t x509_t;
+
 #include <types.h>
 #include <definitions.h>
 #include <crypto/rsa/rsa_public_key.h>
@@ -37,8 +39,6 @@
  */
 #define X509_PRINTF_SPEC 'Q'
 
-typedef struct x509_t x509_t;
-
 /**
  * @brief X.509 certificate.
  *