trie: convert the trie to a patricia trie (or radix tree)
trie: convert the trie to a patricia trie (or radix tree)

http://en.wikipedia.org/wiki/Radix_tree

The point of this is to save memory.

Signed-off-by: Angus Salkeld <86b65304d27d8de73dd7d624c33df7e088f8d94b@redhat.com>

davidvossel/libqb,davidvossel/libqb,gao-yan/libqb,kgaillot/libqb,ClusterLabs/libqb,ClusterLabs/libqb,rubenk/libqb,rubenk/libqb,ClusterLabs/libqb,kgaillot/libqb,kgaillot/libqb,gao-yan/libqb