GUAC-762: Check for ossp/uuid.h vs uuid.h.
GUAC-743: Implement client mapping structure.
GUAC-743: Store and maintain connections within the client map structure.
GUAC-743: Add missing comments to static functions.
GUAC-764: Fully initialize character structure, to satisfy some C compilers and static analyzers.
Merge branch 'master' of https://github.com/glyptodon/guacamole-server