test if dhcpcd can use the bpf capability
A recent dhcpcd testing revealed that SELinux denials appear when
the dhcpcd service (in default configuration) is started on RHEL-9.
The TC reproduces the situation.
In order to avoid such SELinux denials, I believe that SELinux policy
should either allow or dontaudit them. The TC looks for appropriate
policy rules.
The TC covers RHEL-15326.