Re-named tmux variable to maintain consistency.

Author: peteches

scripts/variables.sh

@@ -36,5 +36,5 @@ status_wrap_string="\#{value}"
 systemd_service_name="tmux.service"
 systemd_unit_file_path="$HOME/.config/systemd/user/${systemd_service_name}"
 
-systemd_tmux_server_start_cmd_option="@systemd_tmux_server_start_cmd"
+systemd_tmux_server_start_cmd_option="@continuum-systemd-start-cmd"
 systemd_tmux_server_start_cmd_default="new-session -d"