[Bug 48294] $http_proxy being set incorrectly by Network Proxy

[Mary Gardiner]

Public bug reported:

If I have these settings in System -> Network Proxy, $http_proxy is
being set incorrectly:

[NOT SELECTED] Direct internet connection

[NOT SELECTED] Manual proxy configuration
HTTP proxy: sunhill, port: 3128

[SELECTED] Automatic proxy configuration
Autoconfiguration URL: http://www.it.usyd.edu.au/proxy.pac

Even though "Manual proxy configuration" is not selected and the text is greyed out as per the screenshot I will attach, the following happens when I open new terminals with those settings in place:
$ echo $http_proxy
http://sunhill:3128/

I know that $http_proxy can't be set from the autoconfiguration URL, but
the GUI's use of radio buttons and greying out suggests that it should
*not* fall back to the manual configuration to set $http_proxy, yet it
does. (In my case this behaviour is not only counterintuitive but also
an actual bug in and of itself -- that manual setting is left over from
a previous network.)

** Affects: control-center (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

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$http_proxy being set incorrectly by Network Proxy
https://launchpad.net/bugs/48294