When using osTeleportAgent() and osTeleportAvatar(), only teleport if the region name exactly matches (not near matches)
When using osTeleportAgent() and osTeleportAvatar(), only teleport if the region name exactly matches (not near matches)

This is to prevent situations where the first name returned by GridService.GetRegionsByName is not one that exactly matches the given region name, even when there is an exact match later on in the list.
Only the above two functions call this teleport method (the map uses a different routine) so this seems safe to change.
Addresses http://opensimulator.org/mantis/view.php?id=5606

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