Install init.d file for SLC 6.9

Double checked, seems everything is ok ``` --- Install netdata at system init --- Installing init.d file... [/tmp/foo/netdata-1.8.0]# cp system/netdata-init-d /etc/init.d/netdata OK [/tmp/foo/netdata-1.8.0]# chmod 755 /etc/init.d/netdata OK [/tmp/foo/netdata-1.8.0]# chkconfig netdata on OK --- Start netdata --- [/tmp/foo/netdata-1.8.0]# /sbin/service netdata stop OK [/tmp/foo/netdata-1.8.0]# /sbin/service netdata restart Stopping netdata... [FAILED] Starting netdata... [ OK ] OK [netdata-1.8.0]$ sudo service netdata status netdata (pid 27743) is running... [netdata-1.8.0]$ sudo service netdata restart Stopping netdata... [ OK ] Starting netdata... [ OK ] [netdata-1.8.0]$ sudo service netdata stop Stopping netdata... [ OK ] [netdata-1.8.0]$ sudo service netdata start Starting netdata... [ OK ] [netdata-1.8.0]$ sudo service netdata stop Stopping netdata... [ OK ] [netdata-1.8.0]$ sudo service netdata restart Stopping netdata... [FAILED] Starting netdata... [ OK ] ```