Returns true if value v extends protocol p and
implements every method in protocol p, otherwise false.

A value is considered to 'extend' protocol p either if:
- p implements the protocols interface, or
- p extends the protocol via clojure.core/extend, or
- p implements at least one method via metadata if supported
  by the protocol

Note that fully-satisfies? aims to be deterministic even
in cases where protocol dispatch is non-deterministic, and so
may be innaccurate in those cases.

In cases of multiple-inheritance of interfaces, fully-satisfies? will pick
an implementation by sorting the `supers` of the target object by name
and finding the first interface (from left to right) that implements
the protocol. Then, if it finds any more-specific interfaces (ie.,
sub-interfaces) of this interface in the target class hierarchy, it will pick
that interface's implementation (and apply this algorithm to a fixed point).

See also:
- https://clojure.atlassian.net/browse/CLJ-2656
- https://clojure.atlassian.net/browse/CLJ-1807