[PATCH] Add XDG_STATE_HOME

[piegames]

Any opinions on this? I need some feedback to get it merged.

The patch as merge request on Gitlab: <
https://gitlab.freedesktop.org/xdg/xdg-specs/merge_requests/4>

On Tue, 2019-08-20 at 00:48 +0200, piegames wrote:
> A few years ago, there was a discussion about an `XDG_STATE_HOME`
> folder. I also found a patch that adds `XDG_BIN_HOME` deep in the
> mailing list's archive (which, by the way, is still not merged
> @maintainer).
> 
> I've made a patch similar to the one adding the `bin` directory based
> on the discussion mentioned above.
> 
> Regard,
> piegames
> 
> 
> ---
>  basedir/basedir-spec.xml | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/basedir/basedir-spec.xml b/basedir/basedir-spec.xml
> index 8e6fff6..951c493 100644
> --- a/basedir/basedir-spec.xml
> +++ b/basedir/basedir-spec.xml
> @@ -66,6 +66,13 @@
>              environment variable
> <literal>$XDG_CONFIG_HOME</literal>.
>            </para>
>          </listitem>
> +        <listitem>
> +          <para>
> +            There is a single base directory relative to which user-
> specific
> +            state data should be written. This directory is defined
> by
> the
> +            environment variable <literal>$XDG_STATE_HOME</literal>.
> +          </para>
> +        </listitem>
>          <listitem>
>            <para>
>              There is a set of preference ordered base directories
> relative to
> @@ -121,6 +128,17 @@
>        <literal>$XDG_CONFIG_HOME</literal> is either not set or
> empty,
> a default equal to
>        <literal>$HOME</literal>/.config should be used.
>      </para>
> +    <para>
> +      <literal>$XDG_STATE_HOME</literal> defines the base directory
> relative to
> +      which user-specific state files should be stored. If
> +      <literal>$XDG_STATE_HOME</literal> is either not set or empty,
> a
> default equal to
> +      <literal>$HOME</literal>/.local/state should be used.
> +    </para>
> +    <para>
> +      The <literal>$XDG_STATE_HOME</literal> fits right between
> config
> and cache. It contains
> +      convenience data that should be preserved between sessions of
> a
> program like logs, history, 
> +      last opened view etc.
> +    </para>
>      <para>
>        <literal>$XDG_DATA_DIRS</literal> defines the preference-
> ordered 
> set of
>        base directories to search for data files in addition to the