[GNC] F::Q XAU & XAG quotes not retrieving for 2 years

[Adrien Monteleone]

This has been on my back burner for some time, but I decided to tackle 
it for a spell tonight.

I haven't been able to retrieve an XAG quote since June 2020, and an XAU 
quote since December 2020.

I've updated F::Q, and tried running GnuCash with debug logging, but 
can't seem to find anything useful in the tracefile.

Running the fq-dump from a terminal doesn't tell me anything different 
from running it in GnuCash, only that:

```
     Quotes for the following commodities were unavailable or unusable:
     *CURRENCY:XAG Finance::Quote reported failure set no error.
     *CURRENCY:XAU Finance::Quote reported failure set no error.
```

Is anyone successfully pulling down these quotes?

(*note, I need XAG:USD & XAU:USD)

-- 
Regards,
Adrien