rlm_cache updates for v3.0.x

[Phil Mayers]

On 24/11/14 23:03, Arran Cudbard-Bell wrote:

> Almost no one used the rlm_cache module to cache the results of xlat expansions however,

I was.

> and the behaviour had some odd side effects when working with attribute references,
> so it seems more sensible to leave it disabled by default.
>
> If anyone has any objections to the above behaviour changes, feel free to post them
> to the list.

The return code change seems inappropriate for me in a 3.0.x release. 
3.1 or 4.x would make more sense.

> Testing of current v3.0.x branch would be appreciated.

Sorry, but a straight-out maintenance release I could test. One with 
behaviour changes, I have no time for.