commit e9b26ae5264e28aea08896b29044a670e864ac14
author Roman Arutyunyan <arut@nginx.com> Tue Dec 11 19:41:22 2018 +0300
committer Roman Arutyunyan <arut@nginx.com> Tue Dec 11 19:41:22 2018 +0300
tree 9bbdafc1a1104465b3cd428d554338d71dfff68c
parent 20ebf1513db474a295a36bbf60173edb2a851d1b

Resolver: report SRV resolve failure if all A resolves failed.

Previously, if an SRV record was successfully resolved, but all of its A
records failed to resolve, NXDOMAIN was returned to the caller, which is
considered a successful resolve rather than an error.  This could result in
losing the result of a previous successful resolve by the caller.

Now NXDOMAIN is only returned if at least one A resolve completed with this
code.  Otherwise the error state of the first A resolve is returned.