[Patch] Moving FD passing into the header

[Christian Dywan]

Hejsan,

so I changed Unix FD to not be a basic type anymore, and it's not
anymore part of the message arguments. Instead you add and retrieve
them specifically, see

http://lists.freedesktop.org/archives/dbus/2010-April/012509.html

The API is this:

dbus_bool_t dbus_message_append_unix_fd       (DBusMessage *message,
                                               int          fd);
dbus_bool_t dbus_message_contains_unix_fds    (DBusMessage *message);
int         dbus_message_get_n_unix_fds       (DBusMessage *message);
int         dbus_message_get_unix_fd          (DBusMessage *message,
                                               int          index);

*Getting* duplicates the handle. It is an error to try to get more
descriptors than exist in the message.

I adjusted the two test cases accordingly to use the new API.

-- 
ciao,
    Christian