When constructing via a the cpy parameter, cpy
would maintain ownership; if cpy._free_on_dealloc
was set to true, the new object could have memory
freed while still maintaining a reference to it.
This fixes the issue by having the new object take
ownership. To perform a memory copy, use the elements
argument to the constructor.

Signed-off-by: Alexander Scheel <ascheel@redhat.com>

This introduces a new property, dotted_form, for querying
the dotted form of the OID.

Signed-off-by: Alexander Scheel <ascheel@redhat.com>

This creates a new class, Mechanism, for inquiring
information about a mechanism. This includes support
for RFCs 5587 and 5801. As Mechanism derives from OID,
it is compatible with all places that accept a mech
by OID.

Signed-off-by: Alexander Scheel <ascheel@redhat.com>
Signed-off-by: Alexander Scheel <alexander.m.scheel@gmail.com>