[PATCH] Use talloc_autofree_context() to allocate global memory

[Kamen Mazdrashki]

Hi,

Please find attached several patches to move global structure off of NULL
context into autofree context.
I have hit those while running unit tests in Openchange.

Strictly speaking, patch 0002 is not needed as the caller for this function
uses the memory returned and frees it immediately - we have only 1 caller
at the moment.
Nevertheless, we can't assume what the caller of
debug_list_class_names_and_levels()
is going to do and hence this patch. May be it will be good if we pass
memory context explicitly?

Please review.

A quick summary of changes:
 lib/ldb/common/ldb_modules.c |  6 +++---
 lib/param/loadparm.c         |  2 +-
 lib/tevent/tevent.c          |  2 +-
 lib/util/debug.c             | 12 +++++++++---
 4 files changed, 14 insertions(+), 8 deletions(-)

patches also pushed at:
https://github.com/kamenim/samba/commits/util-debug-use-autofree-context
(probing what will be the feedback for Github :)

Cheers,
kamen
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