[arch-general] Sequoia/Octopus and Thunderbird - alternative OpenPGP support package

[Genes Lists]

I've been using octopus now for a while testing it - and its working 
really well. I much prefer using gpg and the implementation is in rust, 
and seems clean.

The manual installation of octopus library is dead trivial - easy to try 
out for anyone interested. Simply rename librnp.so and put a soft link 
to the octopus version.

I don't think changing the thunderbird base install is the right approach.

While I'm not sure the best way to achieve this but here's one 
suggestion. Package thunderbird in 2 parts :

     (1) thunderbird
     (2) thunderbird-librnp.

Now an separate package of sequoia octopus librnp 
(sequoia-octopus-librnp) can be provided as an alternative package 
supplying librnp.  Thunderbird would now depend on one of these packages 
'providing' librnp.

That way the regular install would remain the same, and for those of us 
that really like the alternative, its just a separate package to 
install. This might also be a good candidate for pacman alternatives 
when available.