This pull request addresses a key aspect of the RPM upgrade process -
handling of scripts during upgrades vice pure deletion events.
An RPM upgrade operation consists of both an Install and an Uninstall
operation, meaning that during an upgrade, our %postun script is run and
previously, it was causing the accidental deletion of binaries needed
for the upgrade.
To prevent this unwanted removal during upgrade scenarios, the %postun
script now checks for the execution scenario in which it finds itself.
71709e5ef9