icinga2-selinux doesn't work on RHEL 10 without nagios-selinux

[Al2Klimov]

First of all

• This issue occurs on RHEL 10.2, hence has nothing to do with EL10 SELinux packages ship policydb v23 modules that RHEL 10.0 cannot load #343
• This issue MAY be the same as Icinga paid repository - broken SELinux package #276 (comment), but latter comment may be overseen, hence this new issue

CC @widhalmt @jwilliams-shadowsoft @julianbrost @lippserd

What's the point

• icinga2-selinux references lots of nagios_*_t types
• nagios-selinux provides those nagios_*_t types
• icinga2-selinux doesn't depend on nagios-selinux

Hence, icinga2-selinux might silently get installed without nagios-selinux and, most important, without any effect.

The fix

• icinga2-selinux: require nagios-selinux on RHEL (https://git.icinga.com/packages/icinga2/-/merge_requests/22)

Any workaround is better than no fix

1. Install nagios-selinux (from EPEL!)
2. Reinstall icinga2-selinux or run semodule -s targeted -i /usr/share/selinux/targeted/icinga2.pp