ubicoo/yourls-pseudonymize — comment on commit 914b0acb86349b6ad6ba718e4be2c8d708d8ecea
File:  line 0
By sas101:

Yep, that's what I documented in issue #2

How about my suggestion there, just handling the IPv4 address at the end of an IPv6 address specially and nulling the last IPv4 byte?