We use deprecated `wget -Y off` parameter in several templates.

As the parameter is not part of the manpage anymore (but still supported for backward compatibility reasons) this might confuse people.

Correct parameter would be `wget --no-proxy`.

Removal of `-Y` parameter: http://git.savannah.gnu.org/cgit/wget.git/commit/?id=0734d8dd3744825c4db56ef0f50bcff111efa18e
Backward compatibility: http://git.savannah.gnu.org/cgit/wget.git/commit/?id=e3acbd2aaf2c1a6556b20243781f4e4b83dbd2a2