Copyright for ethstats source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: ethstats
Upstream-Contact: Unknown and Drew Strieb 
Source: https://devel.ringlet.net/net/ethstats/
License: PD

Files: *
Copyright: released into the public domain
License: PD

Files: debian/*
Copyright: 2002, Scott M. Dier 
           2009 - 2011, 2015 - 2018, Peter Pentchev 
License: PD

License: PD
  I received this without copyright, but have since been told by the owner
  that it is released into the public domain.
  .
  Any changes I make are released into the public domain.
  - M. Drew Streib 
  .
  Similarly to the above, any changes I make are also released into
  the public domain.
  - Peter Pentchev