gdcvault: Do not set a default extension
gdcvault: Do not set a default extension

Due to the redirecting pages we cannot be sure of the extension,
so better not lie.

Boussadia/weboob,yannrouillard/weboob,willprice/weboob,willprice/weboob,Konubinix/weboob,RouxRC/weboob,franek/weboob,yannrouillard/weboob,sputnick-dev/weboob,RouxRC/weboob,Boussadia/weboob,yannrouillard/weboob,nojhan/weboob-devel,laurent-george/weboob,sputnick-dev/weboob,laurent-george/weboob,franek/weboob,Konubinix/weboob,Boussadia/weboob,laurent-george/weboob,nojhan/weboob-devel,frankrousseau/weboob,sputnick-dev/weboob,frankrousseau/weboob,nojhan/weboob-devel,Konubinix/weboob,frankrousseau/weboob,franek/weboob,willprice/weboob,RouxRC/weboob,Boussadia/weboob