sed syntax

src/freedombone-ddns

 
     if ! grep -q "$DDNS_PROVIDER" /etc/inadyn.conf; then
         # remove entry for any previous ddns
-        sed -i '/^system $/,$d' /etc/inadyn.conf
+        sed -i '/system /,$d' /etc/inadyn.conf
 
         # add the new provider
         { echo '';