[FS#391] dnsmasq stops working properly if the fastest upstream DNS server returns a server failure

[LEDE Bugs]

The following task is now closed:

FS#391 - dnsmasq stops working properly if the fastest upstream DNS server returns a server failure
User who did this - Ted Hess (thess)

Reason for closing: Fixed
More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=391