Support for "ref pointer" as arg in function calls

[step2back]

C function interface

EXPORT(int) getSPAMREF(void **ptr)

handling by alien

f:types("int", "ref pointer")

Loot at test_alien.lua for completed test.

[mascarenhas]

HI, sorry for ignoring your pull request for so long. core.c is in flux right now, with changes from two other users. But your patch looks very interesting, so I will be reviewing it again after the others are done. Thanks!

[dalbani]

What's the status of this pull request?
I'd like to be able to call functions like int mosquitto_sub_topic_tokenise(const char *subtopic, char ***topics, int *count).
Shouldn't this ref pointer feature help me interact with this functions? (see the char *** parameter)