Allow aria2c to preserve directory structure

[MCOfficer]

Is your feature request related to a problem? Please describe.
Just noticed that according to the README, aria2c does not preserve directory structure while downloading.

Describe the solution you'd like
This is in fact possible by formatting the URLs file differently (See https://stackoverflow.com/a/28553355/7653274). This feature would best be hidden behind a flag, because it does make the file wget-incompatible.

[KoalaBear84]

True, first I thought it did, so I added it to ODD README, later I saw it (by default) doesn't support it, so I moved it as the second option and added the warning. It's sad that it doesn't do this, as it is very easy to add for them for the standard structure..

Hopefully I can add it. Probably must be a separate command line parameter which will create a second file?

[MCOfficer]

• parameter that creates a *-aria2c.txt file

• always create a *-aria2c.txt file

• parameter that makes the normal .txt file aria2c-compatible

pick one ¯\_(ツ)_/¯

[Chaphasilor]

For what it's worth, I'm voting for the first option 😁

Second option seems unnecessary and the third option basically renders the URL file useless for most other things...

[KoalaBear84]

It will be better to focus on #20 because of the limited time.

[Chaphasilor]

That's what I thought, yeah :D

[ztgasdf]

Bumping as #20 got closed due to metalink becoming essentially defunct.

[KoalaBear84]

Yes, let's reopen it. Might not be super easy, writing the file of course is, but determining the directory might not be, the file should be easy as that is already parsed as a filename.

Also need to take care about special characters, which are different in Windows and Unix, but that may be taken care of in Aria2.