[libvirt] [PATCH v2 0/4] Update the hash table algorithm

This is a followup to https://www.redhat.com/archives/libvir-list/2012-January/msg00734.html Changes in v2: - Replace virRandom with virRandomBits as per Eric's suggested impl - Move virRandom* functions to virrandom.{c,h} - Move virHash impl to virhash.{c,h} - Remove use of le32toh() function - Convert several virHash functions to use size_t / uint32 instead of int/unsigned long - Split into 4 patches for easier review/bisect