Fix error triggered via commands run via console.

[auralon]

When running a console command, I stumbled upon this error...

PHP Error[8]: Undefined index: SERVER_NAME
    in file /var/www/foobar/craft/app/framework/web/CHttpRequest.php at line 352
#0 /var/www/foobar/craft/app/etc/console/ConsoleApp.php(265): Craft\ConsoleApp->handleError()
#1 /var/www/foobar/craft/app/framework/web/CHttpRequest.php(352): Craft\ConsoleApp->handleError()
#2 /var/www/foobar/craft/app/services/ConfigService.php(420): Craft\HttpRequestService->getHostInfo()
#3 /var/www/foobar/craft/app/etc/web/UrlManager.php(80): Craft\ConfigService->usePathInfo()
#4 /var/www/foobar/craft/app/framework/base/CModule.php(394): Craft\UrlManager->init()
#5 /var/www/foobar/craft/app/etc/console/ConsoleApp.php(220): Craft\ConsoleApp->getComponent()
#6 /var/www/foobar/craft/app/framework/base/CModule.php(103): Craft\ConsoleApp->getComponent()
#7 /var/www/foobar/craft/app/services/HttpRequestService.php(1163): Craft\ConsoleApp->__get()
#8 /var/www/foobar/craft/plugins/redirectmanager/RedirectManagerPlugin.php(43): Craft\HttpRequestService->getQueryStringWithoutPath()
#9 /var/www/foobar/craft/app/services/PluginsService.php(150): Craft\RedirectManagerPlugin->init()
#10 /var/www/foobar/craft/app/etc/console/ConsoleApp.php(86): Craft\PluginsService->loadPlugins()
#11 /var/www/foobar/craft/app/framework/base/CApplication.php(170): Craft\ConsoleApp->init()
#12 /var/www/foobar/craft/app/framework/YiiBase.php(121): Craft\ConsoleApp->__construct()
#13 /var/www/foobar/craft/app/etc/console/yiic.php(86): createApplication()
#14 /var/www/foobar/utils/yiic_frontend.php(24): require()

This patch fixes the issue.