Updated mediawiki/extensions
Project: mediawiki/extensions/TorBlock  c834b24d04553ec67fd990e701bab3c8a7e9d73b
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Put loadExitNodes.php into a Maintenance class.

Since loadExitNodes.php is a maintenance script, this change
puts it into a Maintenance script for uniformity.

Change-Id: Ib4571caf8abee3b016219163369a240032068d3c