[Bug 224403] getaddrinfo() resolves "127.0.0.1 www.example.com" to 127.0.0.1

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224403

            Bug ID: 224403
           Summary: getaddrinfo() resolves "127.0.0.1 www.example.com" to
                    127.0.0.1
           Product: Base System
           Version: 11.1-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: standards
          Assignee: freebsd-standards at FreeBSD.org
          Reporter: freebsd-bugzilla at michael-kaufmann.ch

Created attachment 188913
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=188913&action=edit
Test program for getaddrinfo()

getaddrinfo() uses inet_aton(), which ignores trailing spaces after numerical
IP addresses. This means that getaddrinfo() resolves the hostname "127.0.0.1
www.example.com" to the IP address 127.0.0.1.

Please see the attached example program.

This bug is also present in some other operating systems, please see
https://github.com/curl/curl/pull/2073

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