update all scripts

scripts/iptables.sh

@@ -9,8 +9,16 @@ iptables() {
     pkgver=1.8.11
     srcurl=https://www.netfilter.org/projects/iptables/files/${pkgname}-${pkgver}.tar.xz
     print_info "** Building and installing $pkgname"
-    [ ! -d $build/$pkgname ] && mkdir $build/$pkgname
+    [ -d $build/${pkgname} ] && return 0
+    mkdir -p $build/$pkgname
     cd $build/$pkgname
+    if [ ! -f $root/downloads/${pkgname}-${pkgver}.tar.xz ]; then
+        print_info "** Downloading $srcurl"
+        cd $root/downloads
+        wget $srcurl
+        check $? "download $srcurl"
+        cd -
+    fi
     tar -xf $root/downloads/${pkgname}-${pkgver}.tar.xz
     cd ${pkgname}-${pkgver}
     ./configure \