Comment 5 for bug 979477

Ok. Sorry about this; the reasoning here had been that:

 - the desktop network configuration interface syncs the apt proxy settings with the general <proto>_proxy env variables, so in the common case these are the same
 - the flashplugin-installer package has already been looking at the apt proxy settings rather than the http_proxy variable for some time, and nobody seems to have complained
 - sudo is known not to pass http_proxy settings in the environment (for good reason), so users who *do* need a proxy for all http downloads are advised to configure this via the apt proxy settings so that it's applied consistently.

However, this is the second report I've seen of the new proxy behavior being a problem (though I've mislaid the first report), which tells me this is not a winning solution. I'll fix this ASAP to use $http_proxy instead, which seems to be the lesser evil - given that users can always manually set http_proxy if needed, but have no way to selectively un-set the apt proxy for non-apt downloads.