Allow user to specify full YANG compatible XPath 1.0 predicates. This
allows for trimming results of generic queries using functions and other
non-key predicates from XPath 1.0
Signed-off-by: Christian Hopps <chopps@labn.net>
Heard back from libyang folks that this is not something they consider part of
the API and/or are going to guarantee. So we cannot count on it. Expect keys at
any location on the child sibling list.
Signed-off-by: Christian Hopps <chopps@labn.net>
