Just a heads up that starting with gnucash 2.6.20 and 2.7.4 (beta release to
become 3.0) it will no longer be necessary to edit the gnucash environment
file to get Finance::Quote working with the Alpha Vantage quote source.
Instead there will be a new option under Edit->Preferences->Online Quotes
where you can set the key from within gnucash.
This has two advantages:
1. (most obvious) this should be easier
2. you only have to set the key once. It won't be overwritten during a gnucash
I have updated the gnucash FAQ  accordingly. The only remaining issue is
that gnc-fq-update will not retrieve the key from the gnucash settings. So if
you run gnc-fq-update you will still need to add it to the environment as
described in the FAQ.
On a related note, as of the same future gnucash releases you will also find
the version of Finance::Quote that gnucash discovered on the system in the
Gnucash About dialog.
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