The configuration settings "hbase.netty.worker.count" and
"hbase.netty.eventloop.rpcserver.thread.count" appear to duplicate each
other.
Also, formalizes another setting found in NettyEventLoopGroupConfig,
"hbase.netty.nativetransport".
Also, native epoll is not limited to amd64. aarch64 supports it too.
Signed-off-by: Duo Zhang <zhangduo@apache.org>
Conflicts:
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/NettyRpcServer.java
d19805a7bc