(svn r8605) -Codechange: [OSX] changed all objective C to objective C++

This will permanently solve the issue where compilation on OSX broke because C++ code was added to some header files

   -Note: (important if you develop mac specific code)
   taken from http://developer.apple.com/releasenotes/Cocoa/Objective-C++.html           
    gdb lacks an integrated C++ with Objective-C parser. This means that gdb won't be able to evaluate expressions that contain both C++ and Objective-C constructs.
    gdb assumes that the language for ".mm" files is C++.
    you can change it to objective C by typing: (gdb) set language objc 
    Mixing C++ and objective C has some limitation (see link for all of them)

src/md5.h

@@ -72,11 +72,6 @@ typedef struct md5_state_s {
     md5_byte_t buf[64];  /* accumulate block */
 } md5_state_t;
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 /* Initialize the algorithm. */
 void md5_init(md5_state_t *pms);
 
@@ -86,8 +81,4 @@ void md5_append(md5_state_t *pms, const void *data, size_t nbytes);
 /* Finish the message and return the digest. */
 void md5_finish(md5_state_t *pms, md5_byte_t digest[16]);
 
-#ifdef __cplusplus
-}  /* end extern "C" */
-#endif
-
 #endif /* MD5_INCLUDED */