v5.19

Change apteryx refresh timeout return type

Returning an integer type refresh timeout value
causes corruption of the actual timeout value returned
in apteryx.c:call_uint64_callback().
Changing the return type to uint64_t appears to fix the issue.

v5.18

Change behaviour of provide with data in the DB

Previously we returned the DB data in preference to
provided data. We now always return provided data
if a provider exists for the path.

v5.17

Support proxy query and full root node query

Also fix a couple of memory leaks in query.

v5.16

Make code to avoid values on non query leaves more readable

v5.15: apteryx_refresh: Handle apteryx_refresh callbacks with a new function

apteryx_refresh_callback function type returns a uint64_t.
The call_callback function casts this to void *. On 32 bit systems, this
is problematic as half of the returned uint64_t is lost. Depending on
endianness, this may be the half with useful data.

This patch adds a new callback calling function for uint64_t return type.
If the callback is not found, it returns 0.

v5.14: Sort out cb_gather_search

New unit tests shed some light on what cb_gather_search should have
bene.

v5.13

Add comments to cb_gather_search and apteryx_query

v5.12

apteryx_path_to_node: Fix paths with doubled up names

When adding a child node with a prefix that matches the root we were
chopping off bits that needed to stay attached.

v5.11

Ignore missing watch callbacks in client library

This was the previous behaviour

v5.10

Fixup variable names that conflict with global variables

Identified by lgtm.com

Also, remove the unused globals from callbacks.c