build-sys: give recommended configure options for hacking
build-sys: give recommended configure options for hacking

pmmccorm/kmod,Distrotech/kmod,Distrotech/kmod,lucasdemarchi/kmod,lpereira/kmod,lucasdemarchi/kmod,lpereira/kmod,Distrotech/kmod,lpereira/kmod,pmmccorm/kmod,pmmccorm/kmod,lucasdemarchi/kmod