Add Apache Cassandra 3.9 docs and correct src/README `make serve` target


git-svn-id: http://svn.apache.org/repos/asf/cassandra/site@1765381 13f79535-47bb-0310-9956-ffa450edef68
214 files changed
tree: f36f52bb610e8ca42153f24b994615cb0e08c26d
  1. publish/
  2. src/
  3. doap.rdf