OTP-12121

* vladdu/jinterface_fun_equals:
  jinterface: fix bug in equality for OtpErlangFun

Arrays (here: md5 and freeVars) must not be compared with equals, which
is broken.

OTP-12050

* nox/fix-javadoc:
  Fix a few javadoc errors

Reported-by: Boris Mühmer

Arrays have no meaningful toString method, but one must use
Arrays.toString instead. The meaningless value would look for example
like "[C@16f0472", instead of "[2,4]".

This is just a preparation to allow detection of older nodes
that do not understand maps (R16 and older).

to be: 116,Arity, K1,V1,K2,V2,...,Kn,Vn

instead of: 116,Arity, K1,K2,...,Kn, V1,V2,....,Vn

We think this will be better for future internal map structures
like HAMT. Would be bad if we need to iterate twice over HAMT
in term_to_binary, one for keys and one for values.

The API and implementation are simplistic, like for lists and tuples,
using arrays and without any connection to java.util.Map.