When querying the tvdb returns an error, exit with an appropriate error code

[mb5]

Currently, tvnamer exits with 0 even though renaming failed if say tvdb should return a 4xx or 5xx HTTP error. Especially the later ones usually indicate server errors. This behavior makes it more difficult to use tvnamer in scripts if one needs to detect failures. tvnamer should therefore exit with an appropriate error code if renaming should fail because of any HTTP errors.

[dbr]

Hm, true. If it finds any valid file, the exit code will be zero.

Need to think about it further, specifically what should happen if some files are valid, but one errors (e.g what if one series cannot be found?). Any thoughts?

I guess ideally, tvnamer would be more atomic - all the files would be processed first, then the files would be renamed. That way, in batchmode it could error out cleanly

[dbr]

skip_behaviour config option now controls this