Change LoginPage value in settings.xml to http://viewer-login.agni.lindenlab.com

The new viewer login screen (WWE-371) will live at http://viewer-login.agni.lindenlab.com. This site is currently redirecting all traffic to the old login screen. We'd like to update the LoginPage url in the viewer now, so we'll be all set for an easy web launch in 1-2 weeks.

Specifically it's this block starting at line 4822 in settings.xml:

    <key>LoginPage</key>

    <map>

      <key>Comment</key>

      <string>Login authentication page.</string>

      <key>Persist</key>

      <integer>1</integer>

      <key>Type</key>

      <string>String</string>

      <key>Value</key>

      <string>http://viewer-login.agni.lindenlab.com/</string>

    </map>