daemon: Read ISO9660 Primary Volume Descriptor directly.

It turns out we can read the information we need for the isoinfo API
directly from the ISO9660 PVD.  We don't need to use either isoinfo or
xorriso.  This also has the advantages of reducing by 1 the number of
dependencies in the appliance, and reducing potential vulnerability to
a crafted ISO file.

This also fixes timezone calculation for the datetime fields.

Thanks: Thomas Schmitt
Updates: commit efb8a766ca

appliance/packagelist.in

@@ -26,7 +26,6 @@ ifelse(REDHAT,1,
   cryptsetup
   cryptsetup-luks      dnl old name used before Fedora 17
   dhclient
-  genisoimage
   gfs-utils
   gfs2-utils
   grub
@@ -45,7 +44,6 @@ ifelse(REDHAT,1,
   syslinux-extlinux
   systemd              dnl for /sbin/reboot and udevd
   vim-minimal
-  xorriso              dnl alternative for genisoimage
   xz
   zfs-fuse
 )
@@ -57,7 +55,6 @@ dnl old name used in Jessie and earlier
   cryptsetup
   dash
   extlinux
-  genisoimage
 dnl gfs-tools, gfs2-tools have been renamed to gfs2-utils
   gfs-tools
   gfs2-tools
@@ -85,7 +82,6 @@ dnl iproute has been renamed to iproute2
   systemd                   dnl alternative for /sbin/reboot
   ufsutils
   vim-tiny
-  xorriso                   dnl alternative for genisoimage
   xz-utils
   zfs-fuse
   uuid-runtime
@@ -124,13 +120,11 @@ ifelse(SUSE,1,
   cryptsetup
   dhcpcd
   dhcp-client
-  genisoimage
   glibc-locale
   gptfdisk
   initviocons
   iproute2
   iputils
-  mkisofs
   ntfsprogs
   ntfs-3g
   reiserfs
@@ -164,8 +158,6 @@ ifelse(FRUGALWARE,1,
 ifelse(MAGEIA,1,
   cryptsetup
   chkconfig /* for /etc/init.d */
-  cdrkit-genisoimage
-  cdrkit-isotools
   dhcp-client
   extlinux
   gfs2-utils
@@ -190,8 +182,6 @@ ifelse(MAGEIA,1,
 ifelse(OPENMANDRIVA,1,
   cryptsetup
   chkconfig /* for /etc/init.d */
-  cdrkit-genisoimage
-  cdrkit-isotools
   dhcp-client
   extlinux
   grub2