FreeBSD 4.11 Ports Issue

[ohlund at woodwrecker.com]

I'm trying to rebuild MailScanner under FreeBSD 4.11 and I get the following:

===>    Verifying install for
/usr/local/lib/perl5/site_perl/5.6.2/mach/Filesys/Df.pm in
/usr/ports/sysutils/p5-Filesys-Df
===>  p5-Filesys-Df-0.92 requires statvfs() which is not available before
FreeBSD-5*.
*** Error code 1

Stop in /usr/ports/sysutils/p5-Filesys-Df.
*** Error code 1

Stop in /usr/ports/mail/mailscanner.

Looks like some of the ports expect the code to have V5 routines available
although I'm only updating from RELENG-4. The error message is originating
from the Makefile which is specifically checking for an OS version >= 5.0.

Any ideas?
> You can also make such adjustments via email by sending a message to:
>
>   MailScanner-request at lists.mailscanner.info
>
> with the word `help' in the subject or body (don't include the
> quotes), and you will get back a message with instructions.
>
> You must know your password to change your options (including changing
> the password, itself) or to unsubscribe.  It is:
>
>   Str8Line
>
> Normally, Mailman will remind you of your lists.mailscanner.info
> mailing list passwords once every month, although you can disable this
> if you prefer.  This reminder will also include instructions on how to
> unsubscribe or change your account options.  There is also a button on
> your options page that will email your current password to you.
>