Bug#934289: evince-common: Make evince compatible with mailcap.order

[Jakub Wilk]

>* Judicael Courant <judicael at jcourant.fr>, 2019-08-09, 10:07:
>>I would like 'see foo.pdf' to open evince (for all users).
>>
>>I guess mailcap.order(5) is the right place to give evince priority 
>>over other pdf readers. Unfortunately that does not work: I added 
>>the line
>>
>>evince:application/pdf
>
>FWIW, you should be able to make it work by using the name of the 
>deskop file:
>
>org.gnome.Evince:application/pdf
>
>Admittedly this is neither intuitive nor (AFAIK) documented anywhere. 
>:-/

In the mean time, someone opened #935426 asking for documentation 
update.

-- 
Jakub Wilk