Changes

* {{Bug|564148}} Key "Thunderbird in the enterprise" bugs [meta] - is a meta bug, which by definition links to other bugs where solutions and issues are worked on (i.e. the meta bug is not for 'work' or discussion).<p>'''{{Bug|tb-enterprise}}''' aka {{Bug|564148}}, is for bugs of special importance to enterprises. Subscribe (Cc) to the meta bug so that you will get email notices of progress as the bugs blocking it are fixed, and as new bugs are added. Please add bugs to the meta so that they get proper attention, but please carefully read the criteria for blocking [https://bugzilla.mozilla.org/show_bug.cgi?id=564148#c2], and [https://bugzilla.mozilla.org/show_bug.cgi?id=564148#c1].(A meta bug is not for 'work' or discussion. The bugs to which the meta is linked is where the development of solutions occurs.)