These should be added to XFree86-server: 
 
1. 
%install 
[...] 
chmod 700 %buildroot%_x11bindir/XFree86 
 
2. 
PreReq: xfree86-server-control 
 
3. 
%pre server 
/usr/sbin/groupadd -r -f xgrp 
if [ $1 -ge 2 ]; then 
	/usr/sbin/control-dump xfree86-server 
fi 
 
%post server 
if [ $1 -ge 2 ]; then 
	/usr/sbin/control-restore xfree86-server 
else 
	/usr/sbin/control xfree86-server public 
fi 
 
4. 
%files server 
[...] 
%_x11bindir/XFree86