Notable changes to system management

Review the most notable changes to system management between RHEL 9 and RHEL 10.

The perl(Mail::Sender) module has been removed
The perl(Mail::Sender) module is removed from RHEL 10 without any replacement. As a consequence, the checkbandwidth script from net-snmp-perl package does not support email alerts when bandwidth high/low levels for a host or interface are reached.