[PATCH] Support proxies with identical names in Lua core.proxies (no replies)

Hi guys,

While playing with Lua API I've noticed that core.proxies attribute
doesn't return all the proxies, more precisely the ones with same names
(e.g. for frontend and backend with the same name it would only return
the latter one).

Here is a patch which tries to fix that, avoiding using the proxy name
as a key for Lua table.
We use a plain integer offsets (starting from 1) to create numerical
array/table iterable by both pairs() and ipairs() in Lua.

The patch also applies cleanly to 1.7 branch.

Best regards,
Adis