XFree86 3.3 in 5.1 -RELEASE's ports collection?

[Zhang Weiwu]

Hello. Newbie question again:

This is the first time I try to compile XFree86. Before that I took a
look at /usr/ports/x11/XFree86/pkg-descr where it says:

XFree86 is a added-value pack for X11R6 that supports several versions
of Intel-based Unix and Unix-like operating systems.  XFree86-3.0 was
part of the X11R6 core distribution.

AFAIK the XFree86 package shipped with my FreeBSD 5.1 RELEASE cdrom is
version 4.3, but why the port say it is 3.0?