message: Fixed Copyright notices in LicenseInfo()
  Veil Copyright notice was appearing as duplicated, one notice before Bitcoin, and one notice after Particl. Veil Copyright year has also been fixed (2009 --> 2018).
diff: @@ -561,11 +561,10 @@ std::string LicenseInfo()
  const std::string URL_SOURCE_CODE = "<https://github.com/veil-project/veil>";
  const std::string URL_WEBSITE = "<https://veil-project.com>";
  - return CopyrightHolders(strprintf(_("Copyright (C) %i-%i"), 2009, COPYRIGHT_YEAR) + " ") + "\n" +
  - "Copyright (C) 2009-2019 The Bitcoin Core developers" + "\n"
  - "Copyright (C) 2015-2019 PIVX Developers" + "\n" +
  + return std::string("Copyright (C) 2009-2019 The Bitcoin Core developers") + "\n"
  + "Copyright (C) 2015-2019 The PIVX Developers" + "\n" +
  "Copyright (C) 2017-2019 The Particl Developers" + "\n" +
  - "Copyright (C) 2018-2019 Veil Developers" + "\n" +
  + CopyrightHolders(strprintf(_("Copyright (C) %i-%i "), 2018, COPYRIGHT_YEAR)) + "\n" +
  "\n" +
  strprintf(_("Please contribute if you find %s useful. "
  "Visit %s for further information about the software."),
  