r4591: - converted the other _p talloc functions to not need _p

r4591: - converted the other _p talloc functions to not need _p

- added #if TALLOC_DEPRECATED around the _p functions

- fixes the code that broke from the above

while doing this I fixed quite a number of places that were
incorrectly using the non type-safe talloc functions to use the type
safe ones. Some were even doing multiplies for array allocation, which
is potentially unsafe.
(This used to be commit 6e7754abd0c225527fb38363996a6e241b87b37e)