Adding 6.x support with Bootstrap user addition

templates/init/debian/elasticsearch.j2

@@ -60,6 +60,7 @@ DATA_DIR={{ data_dirs | array_to_str }}
 
 # Elasticsearch configuration directory
 CONF_DIR={{conf_dir}}
+ES_PATH_CONF={{ conf_dir }}
 
 # Maximum number of VMA (Virtual Memory Areas) a process can own
 {% if es_max_map_count is defined %}
@@ -91,7 +92,11 @@ fi
 # Define other required variables
 PID_FILE="$PID_DIR/$NAME.pid"
 DAEMON=$ES_HOME/bin/elasticsearch
+{% if (es_version | version_compare('6.0.0', '<')) %}
 DAEMON_OPTS="-d -p $PID_FILE -Edefault.path.logs=$LOG_DIR -Edefault.path.data=$DATA_DIR -Edefault.path.conf=$CONF_DIR"
+{% else %}
+DAEMON_OPTS="-d -p $PID_FILE"
+{% endif %}
 
 export ES_JAVA_OPTS
 export JAVA_HOME
@@ -156,6 +161,10 @@ case "$1" in
 		ulimit -l $MAX_LOCKED_MEMORY
 	fi
 
+	if [ -n "$MAX_THREADS" ]; then
+		ulimit -u $MAX_THREADS
+	fi
+
 	if [ -n "$MAX_MAP_COUNT" -a -f /proc/sys/vm/max_map_count ]; then
 		sysctl -q -w vm.max_map_count=$MAX_MAP_COUNT
 	fi