[rfc][icedtea-web] fix for RH947647, following the XDG basedir specification

[Omair Majid]

Hi Jiri,

On 05/20/2013 03:11 PM, Jiri Vanek wrote:
> This fix is migrating us to  ~/.config/icedtea and ~/.cache/icedtea
> instead of ~/.icedtea.

We decided on the current paths (and files and formats) to stay as close
to the proprietary JREs as possible. We have deviated from this in the
past (the contents of the cache directory, for example), but it's either
because of something not (yet) implemented in icedtea-web, or something
the user should never have to care about (like cache directory layout).

I am not sure if that decision was perfect, but if we are going to
change this now, I would like us to weigh all the pros and cons.

As far as the patch itself goes, two things jump out to me:

1. We need to stay backwards compatible, if possible. For things like
configuration files, we should check the old locations too. For the
persistence cache, not reading the old data is like throwing away user's
data.

2. The patch seems to be missing support for using the environment
variables (such as $XDG_CONFIG_DIRS) to specify the locations of the
directories.

Thanks,
Omair

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