[dev] Ansel vfs direct patch

[Duck]

Patch changes the behaver of VFS direct option to be string of the path to the 
images.  

Because sometimes, is not needed to set a special alias, as the files can be 
already public exposed or even we don't have the right to set a an alias in 
the web-server. And with the last vhost support, it allows easy display 
images on the public host, while editing images on the group-ware  internal 
host.

Duck
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