Please enhance zypper ps so that it mentions if a reboot is needed.

I know that this is not as easy to detect as open files ;-) - but there might
be a good-enough simple way to implement this:

a) when installing a patch with the "reboot needed" flag, zypper should
   create a file  /run, basically   touch /run/reboot_needed   (needless to 
   say that /run is a ramdisk, so that file will be gone after a reboot)

b) zypper ps should then check if that file exists, and print "reboot needed"

Bonus points if the kernel %post also creates the /run/reboot_needed file ;-)