remove_mediasrv & remove_nas:
 * move showfritznasdbstart & fritznasdb to remove_nas
 * delete libavmdb.so & libwebusb.so onyl if both are selected


git-svn-id: file:///var/svn/freetz/trunk@10052 149334a1-2f27-0410-a3b9-fc62619ac1e6