Scott Moser 84c7720af5 add protection against dns-redirection to is_resolvable
In an effort to make the EC2 Datasource's search under ec2.archive.ubuntu.com
resilient against dns redirection, we add some code to is_resolvable.

One future enhancement for this would be to protect against server side
round robin results.  Ie, if 'bogus-entry' returned 10.0.1.1 one time, and then
10.0.1.2 a second time.  We could check if results where within the same 3
octets, and assume invalid if they were.
2012-08-06 15:59:41 -04:00
..
2012-06-29 20:38:19 -07:00
2012-06-22 12:35:51 -07:00