The currently shipped version of InspIRCd (v2.0.29) is an insecure EOL version that has not been receiving security fixes or support in quite some time. I know of at least one security vulnerability in the v2 branch which has been found since the v2 branch was EOLed so it really shouldn't be used. Please can you upgrade your package the latest release (which at time of writing currently v3.13.0)? [Note: I am the upstream for this software not an ALT Linux user.]
If you don't have the time or resources to update this package would you consider removing it so users aren't unknowingly using an insecure version?