Non-POSIX compliant portions of FreeBSD

[Eitan Adler]

>    I'll keep on providing a full list of items where we aren't POSIX
> compliant, but it'd be interesting to get a response about whether or
> not the items I submit are known or not, and whether or not they were
> conscious design decisions and/or items which need to be fixed.
> Thanks,
> -Garrett

Can you make this into a wiki page along with the comments you receive?