Kernel configuration

[Toni Heinonen]

% grep NFS /usr/src/sys/i386/conf/MEITSIN
#options        NFSCLIENT               # Network Filesystem Client
#options        NFSSERVER               # Network Filesystem Server
#options        NFS_ROOT                # NFS usable as /, requires NFSCLIENT
% ls /boot/kernel/nfs*
/boot/kernel/nfsclient.ko       /boot/kernel/nfsserver.ko
% grep MEITSIN /boot/kernel/kernel 
Binary file /boot/kernel/kernel matches

I didn't give options NFSCLIENT or NFSSERVER yet it seems to have compiled support. What gives?