The fsync package provides Mutex and RWMutex types which aim to provide
the same semantics as their namesakes in the sync package, extending
that locking across processes by using file locks and randomly-generated
identifiers to allow processes to determine whether or not they were the
last to modify a resource that's protected by the lock.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com> (github: nalind)
