Bug#338290: Can't start X twice on GNU/kFreeBSD

[Petr Salinger <Petr.Salinger@t-systems.cz>]

Hi David.

> Have you seen the annotation that Aurelien did on Jan 2nd 
> in the upstream bug report?:

Yes, it is another approach to fix it.
In fact, this coding style is already used i.e. in 
extras/Mesa/src/glx/mini/miniglx_events.c

GNU/kFreeBSD has problem with
    namelen = strlen(sockname.sun_path) + sizeof(sockname.sun_family);

It will work with either 
    namelen = strlen(sockname.sun_path) + offsetof(struct sockaddr_un, sun_path);
or 
    namelen = sizeof(struct sockaddr_un);

The first fix is closer to previous code, both are correct.

> Anyway, I am applying your patch, as it is correct for you.

Thanks
        
        Petr