Merge ~xnox/casper:add-ssl into casper:master

[Dimitri John Ledkov]

Switch to ssl, busybox in groovy in live-cd images initrd has ssl support now.

[Dimitri John Ledkov (xnox)]

review: Approve (self-approve)

diff --git a/scripts/casper b/scripts/casper
index 2711bc7..6e9ff35 100644
--- a/scripts/casper
+++ b/scripts/casper
@@ -374,8 +374,8 @@ do_interactive_netmount() {
         *)
             case $DPKG_ARCH in
                 amd64)
-                    server_url=http://releases.ubuntu.com/$UBUNTU_CODENAME/ubuntu-$VERSION_ID-live-server-$DPKG_ARCH.iso
-                    desktop_url=http://releases.ubuntu.com/$UBUNTU_CODENAME/ubuntu-$VERSION_ID-desktop-$DPKG_ARCH.iso
+                    server_url=https://releases.ubuntu.com/$UBUNTU_CODENAME/ubuntu-$VERSION_ID-live-server-$DPKG_ARCH.iso
+                    desktop_url=https://releases.ubuntu.com/$UBUNTU_CODENAME/ubuntu-$VERSION_ID-desktop-$DPKG_ARCH.iso
                     ;;
                 *)
                     server_url=http://cdimage.ubuntu.com/releases/$UBUNTU_CODENAME/release/ubuntu-$VERSION_ID-live-server-$DPKG_ARCH.iso