[GNC] Gnucash doesn't load American Express QFX files

[Jim Leek]

An update on this.  The development branch, at least, on the libofx github
https://github.com/libofx/libofx can parse the American Express OFX files.
I'm not sure when that ability was added, I didn't try any releases, just
the latest commit on the github.  So I was able to get them working with
GnuCash 3.6.  I assume this version of libofx will make it into the
repositories eventually, but for now users will have to build their own
libofx I guess.

Jim