[ixpmanager] IRRDB error handling

[Nick Hilliard]

Pete Ashdown wrote on 14/03/2021 18:53:
> Had a customer who entered their AS macros wrong, and as a result, they 
> blocked everyone below them alphabetically from receiving IRRDB 
> updates.  It would be good if the update would continue over these kind 
> of errors.  Here is the output from the crash:

Hi Pete,

This should already be fixed in master:

> https://github.com/inex/IXP-Manager/commit/d67b493d30c6483ded4d265d7d51c30924a26739

Nick