Mine

# EXTRAOPTS can be used to enable/disable AFSDB support (-afsdb)
# and Dynroot (dynamically-generated /afs) support (-dynroot).
EXTRAOPTS="-afsdb -dynroot"

LARGE="-stat 2800 -dcache 2400 -daemons 5 -volumes 128"
MEDIUM="-stat 2000 -dcache 800 -daemons 3 -volumes 70"
SMALL="-stat 300 -dcache 100 -daemons 2 -volumes 50"

if [ -f $AFSDOPT ]; then
    OPTIONS=`cat $AFSDOPT`
else
    OPTIONS="$MEDIUM $EXTRAOPTS"
fi 

.....

echo "Starting afsd"
/usr/vice/etc/afsd $OPTIONS