Use zypper to check for reboot on openSUSE

[BrianAllred]

openSUSE's zypper package manager has the command zypper ps -s to check for processes that need a restart. Utilizing this for openSUSE installations would be awesome since needrestart doesn't support zypper/openSUSE.

[s34m]

This could be implemented but would require a logic to parse and analyse zypper ps -s output because not every process needs a system reboot. This could be avoided by having a config flag like restart_on_zypper_update_processes or something like that.