Subject: bug#8968: arc-mode 7z writing support

From: Jason Rumney <[email-masked]>
Date: Sat, 09 Jul 2011 19:26:43 +0800

Eli Zaretskii <[email-masked]> writes:

>> The difference between programs `7z' and `7za' is not essential:
>> one of them is just a standalone version of another.
>
> That's not what Jason said.

The non standalone version can load additional external libraries. That
is where the non-Free part comes in.  Aside from that additional
capability, Juri is essentially correct.