Restore the behavior of the default ServerName to not advertise any
  assumptions if it locates a legitimate dotted/fully qualified domain
  name from tcp/ip.  Retains advertising of any ServerName that fell
  through to a dotted ip address name, or the loopback address.

  Resolves concerns (I hope) of Jeff, Ken and others.

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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@85847 13f79535-47bb-0310-9956-ffa450edef68