Added OS-independent definition of HOST_NAME_MAX

#include <netinet/in.h>

#include <ifaddrs.h>

#define KINETIC_PORT 8213

// Windows doesn't use <unistd.h> nor does it define HOST_NAME_MAX.

#if defined(WIN32)

    #include <windows.h>

    #include <winsock2.h>

    #define HOST_NAME_MAX (MAX_COMPUTERNAME_LENGTH+1)

#else

    #if defined(__unix__)

        // Some Linux environments require this, although not all, but it's benign.

        #define _BSD_SOURCE

        #include <unistd.h>

    #else

        #if defined(__APPLE__)

            // MacOS does not defined HOST_NAME_MAX so fall back to the POSIX value.

            // We are supposed to use sysconf(_SC_HOST_NAME_MAX) but we use this value

            // to size an automatic array and we can't portably use variables for that.

            #define HOST_NAME_MAX _POSIX_HOST_NAME_MAX

        #else

            #if !defined(HOST_NAME_MAX)

                #define HOST_NAME_MAX 256

            #endif // HOST_NAME_MAX

        #endif // __APPLE__

    #endif  // __unix__

#endif  // WIN32

#define KINETIC_PORT 8213

typedef struct _KineticConnection

{