Changes

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* [https://developer.mozilla.org/en/Thunderbird/Thunderbird_in_the_Enterprise Thunderbird in the Enterprise - DEVMO documents]

** [https://developer.mozilla.org/en/Thunderbird/Deploying_Thunderbird_in_the_Enterprise/Upgrading_Thunderbird_in_the_Enterprise Upgrading Thunderbird in the Enterprise]

** [https://developer.mozilla.org/en/Thunderbird/Deploying_Thunderbird_in_the_Enterprise/Thunderbird_Preferences_Relevant_to_Enterprises Preferences Relevant to Enterprises]