[sr-dev] [kamailio/kamailio] Kamailio on RHEL/Centos 8 issue with SCTP associations created towards endpoint's primary and secondary IP addresses (#2429)

[Daniel-Constantin Mierla]

I don't have any sctp testbed, but since this popped up with an OS upgrade, likely there are some changes in the sctp lib api/behaviour that require the module to be enhanced to follow them.

For whoever is going to work on this enhancement, here are some useful comments made by @fredposner on matrix chat when discussing this:

```
centos 8 made a lot of changes... I know there's a different method in which the OS itself handles SCTP.

    > Blacklisting SCTP module by default in RHEL 8

    To increase security, a set of kernel modules have been moved to the kernel-modules-extra package.
These are not installed by default. As a consequence, non-root users cannot load these components
as they are blacklisted by default. To use one of these kernel modules, the system administrator must
install kernel-modules-extra and explicitly remove the module blacklist. As a result, non-root users will
be able to load the software component automatically.
```

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