Comment 4 for bug 1785879

Thank for look into my request. Yes, I'm having in mine that if KiCad support both file:// or http:// would be nice. And for relative path I think there is couple way for help it more flexible for example:

Most likely, it make for sense to relative path to the folder where the symbol got defined (the library folder). And we can invent a syntax for relative path as such:

1. "file://./../doc/A744.pdf". Using the "dot" indicate the current folder of the symbol.
2. "file://{ENVIRONMENT_VARIABLE}/doc/A744.pdf". Using the environment variable for location of the datasheet.

What do you think?