Resolve #11: update dropbear options

Author: Andrei-Pozolotin

initrd-dropbear.service

@@ -14,15 +14,12 @@ Requires=initrd-shell.service
 Requires=initrd-network.service
 
 [Service]
-Environment=IDLE_TIME=300
 # dropbear options:
 # -s     Disable password logins.
 # -j     Disable local port forwarding.
 # -k     Disable remote port forwarding.
-# -m     Don't display the message of the day.
 # -F     Don't fork into background.
-# -I     Disconnect after idle timeout (seconds).
-ExecStart=/bin/dropbear -s -j -k -m -F -I ${IDLE_TIME}
+ExecStart=/bin/dropbear -s -j -k -F
 ExecReload=/bin/kill -HUP ${MAINPID}
 # dropbear reports 1 when exiting on SIGTERM
 SuccessExitStatus= 0 1