renamed: whonix_gateway/etc/network/interfaces -> whonix_gateway/etc/network/interfaces.whonix;
renamed: whonix_gateway/etc/resolv.conf -> whonix_gateway/etc/resolv.conf.whonix;
added to debian/whonix-gateway-common.displace
build-steps/2000_install-common-packages: prevent mounting /etc/resolv.conf from the host inside the chroot,
/etc/resolv.conf from whonix source folder can get installed.;

help-steps/chroot-img: added variable to support disabling mounting of /etc/resolv.conf inside chroot
deleted whonix_workstation/etc/polipo/config (not installed, not in use)
displaced:
- whonix_workstation/etc/network/interfaces
- whonix_workstation/etc/resolv.conf
- whonix_workstation/etc/rinetd.conf
Removed "chmod --recursive +x /home/user/Desktop/*",
test wise disabled since files in /usr/share/applications/whonix/ are already
executable, this might work.
- whonix_gateway/usr/share/whonix/postinst.d/70_desktopicons
- whonix_workstation/usr/share/whonix/postinst.d/70_desktopicons