prerving envelope address via X-Original-to

Good day.

A newbie amavisd-new user here. I run a small mail server for myself & 
family. Recently I've changed from to a iredmail system and discovered 
postfix/amavisd setup. For a long time I have a set of filters that rely 
on the X-Envelope-to header, and suddenly all these filters stopped working.

This question was apparently discussed here several times, yet I failed 
to find an up to date answer.

So, firstly, BCC reveal is not the issue - this is a family setup and 
all users are in "trusted circle" - if the message is sent to two or 
more users via BCC it is explicitly OK for any user of this server to 
learn other BCC recipients.

My perl knowledge is very limited, but as it was mentioned here, the 
X-Envelope-to could be added inside add_forwarding_header_edits_common sub .

I'm using a debian system, and my understanding is that it is possible 
to add a hook to amavis/conf.d/something that would modify actions 
inside add_forwarding_header_edits_common without hacking original 
script in /usr/sbin ?

Is this possible? The specific code would be very welcome.

Thanks!