By default, the X Server installs as a set-user-id root binary. When run by
a normal user, it checks arguments and environment as done in the x11/wrapper
port before handling them normally.  If you are concerned about the security
of this, but still want to run an X Server (for example using xdm/kdm/gdm,
which will still run the server as root), you can cancel the build and set
xorg-server_UNSET=SUID in /etc/make.conf.
===> Fetching all distfiles required by xorg-dmx-1.7.7_13,1 for building
*** Error code 2

Stop.
make: stopped in /buildshare/ports/355755/x11-servers/xorg-dmx