[pgjdbc/pgjdbc] f26615: Update README.md - Mailing list pgsql-jdbc

Branch: refs/heads/davecramer-add-hostdb
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: f266158acd07bc97a267942eb09cd4c596e3c108
      https://github.com/pgjdbc/pgjdbc/commit/f266158acd07bc97a267942eb09cd4c596e3c108
  Author: Dave Cramer <davecramer@gmail.com>
  Date:   2018-08-29 (Wed, 29 Aug 2018)

  Changed paths:
    M certdir/README.md

  Log Message:
  -----------
  Update README.md

add hostdb for ssl tests



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