change '-s' option to accept multiple systems by comma separated form.
change '-s' option to accept multiple systems by comma separated form.

snmsts/roswell,kubov/roswell,JulienBoubechtoulaAmabis/roswell,amarie-formation/roswell,pradhyu/roswell,pradhyu/roswell,fukamachi/roswell,JulienBoubechtoulaAmabis/roswell,Rudolph-Miller/roswell,snmsts/roswell,kubov/roswell,guicho271828/roswell,JulienBoubechtoulaAmabis/roswell,guicho271828/roswell,pradhyu/roswell,kubov/roswell,JulienBoubechtoulaAmabis/roswell,amarie-formation/roswell,roswell/roswell,Rudolph-Miller/roswell,Rudolph-Miller/roswell,roswell/roswell,amarie-formation/roswell,fukamachi/roswell,guicho271828/roswell,Rudolph-Miller/roswell,roswell/roswell,kubov/roswell,roswell/roswell,snmsts/roswell,guicho271828/roswell,fukamachi/roswell,amarie-formation/roswell,JulienBoubechtoulaAmabis/roswell,fukamachi/roswell,pradhyu/roswell,snmsts/roswell