1.6.0 Release

[MichaCo]

This is mostly a bug fix release, but because the behavior of the LookupClient changed quite a bit, it is a full new version.

The bug fix includes fixes for some odd UDP issues mostly under Linux.
I hope @euyuil, @djj0809, @DejanPelzel, @JamesKovacs and others can help me test the new version. Please let me know if you still see any of those problems you reported.

Thanks
Michael

New / Change

In 1.5, the DNS response ID validation was lifted to just log warnings.
This mechanic has been reverted to throw an error but with a bit better handling and retrying the request thanks to @JamesKovacs. See #140

Bug Fixes

• Until this version, UDP sockets were reused in favor of performance. That did cause some issues though and all kind of pooling has been removed. See Critical issue with response poisoning #132
• See NullReferenceException - LookupClient.ProcessResponseMessage #136, removed a case where the response was null and might have caused some errors in some cases
• When run in Azure Functions, the Name Resolution policy feature we added in 1.5 threw a Platform not Supported exception, although we did check for IsOSPlatform(OSPlatform.Windows). Seems that was not enough. See Azure Functions - PlatformNotSupportedException unless you mannauly set IPEndPoint #133