Get rid of the fixed-size 'hostname' buffer in every port-forwarded

[sgt/putty] / windows / website.url

[InternetShortcut]
URL=http://www.chiark.greenend.org.uk/~sgtatham/putty/
\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0