[Bugs] #3414 UNSP: Fix non-utf-8 ESSID handling

[Sugar Labs Bugs]

#3414: Fix non-utf-8 ESSID handling
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    Reporter:  martin.langhoff            |          Owner:             
        Type:  defect                     |         Status:  new        
    Priority:  Unspecified by Maintainer  |      Milestone:  0.96       
   Component:  sugar                      |        Version:  Unspecified
    Severity:  Unspecified                |       Keywords:             
Distribution:  Unspecified                |   Status_field:  Unconfirmed
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 Current Sugar assumes ESSID is utf-8. ESSIDs can be anything, and are
 sometimes byte sequences that are not valid as utf-8, triggering a crash.
 Details at http://dev.laptop.org/ticket/11698

 Sugar's NM-client code must match NM's handling of ESSIDs for display, as
 discussed in http://developer.gnome.org/libnm-util/unstable/libnm-util-nm-
 utils.html#nm-utils-ssid-to-utf8

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3414>
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