package/vtun: update to 3.0.3

Against all odds, vtun had a new release sometime last year.

Still, the code needs patching:
  - the existing patch to fix installation has been refreshed
  - the existing patch to fix blowfish header location has been
    replaced (see below)
  - configure looks in hard-coded, host paths (eg. /usr/include)
    without any consideration for scross-compilation
    --> new patch
  - configure.in does not even pass an autoreconf without a
    bit of love first (it's written in an ancient dialect that
    autoreconf does no longer recognise)
    --> new patch

Remove obsolete, unused, bit-rotting scripts and warning.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>