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/utils/host.h

@@ -25,6 +25,9 @@
 #ifndef HOST_H_
 #define HOST_H_
 
+typedef enum host_diff_t host_diff_t;
+typedef struct host_t host_t;
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <sys/types.h>
@@ -35,7 +38,6 @@
 
 #include <types.h>
 
-
 /**
  * printf() specifier to print a host.
  * The specifier option '#' does include the port number, e.g.:
@@ -43,8 +45,6 @@
  */
 #define HOST_PRINTF_SPEC 'H'
 
-typedef enum host_diff_t host_diff_t;
-
 /**
  * Differences between two hosts. They differ in
  * address, port, or both.
@@ -55,8 +55,6 @@ enum host_diff_t {
 	HOST_DIFF_PORT = 2,
 };
 
-typedef struct host_t host_t;
-
 /**
  * @brief Representates a Host
  *