* SVCNAME is deprecated for a very long time, RC_SVCNAME should be used
* nice 0 is the default value, not needed to define
* error.log was previously owned by root instead of the ES user, so we need to fix it
ES now uses $ES_CONF_DIR/jvm.options to set java options so duplicate
java options have been removed from the initd / conf.d
service supervision with OpenRC's supervise-daemon added
added README.alpine with notes for upgrading ES 2.x => 5.x