[Bugs] #3270 NORM: Avoid using gconf for getting proxy settings

[Sugar Labs Bugs]

#3270: Avoid using gconf for getting proxy settings
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    Reporter:  alsroot           |          Owner:  alsroot                    
        Type:  enhancement       |         Status:  new                        
    Priority:  Normal            |      Milestone:  Unspecified by Release Team
   Component:  sugar-server-kit  |        Version:  Unspecified                
    Severity:  Unspecified       |       Keywords:                             
Distribution:  Unspecified       |   Status_field:  Unconfirmed                
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 The reason is using only standard way to get information about proxy
 settings. Also gconf might be fragile (at least for some versions on
 fc9(11?)) for getting user gconf values from root user.

 This implementation reads http_proxy envar from the caller process. That
 should work fine in Sugar Shell since it exports this envar even if proxy
 was set in gconf.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3270>
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