all of the cors_catch wrapper stuff should be moved to http_request_expansion

Example
https://github.com/Anniepoo/identity/blob/master/prolog/identity/identity.pl

Currently, I get:

?- use_module(library(sockets)).
   true.
?- socket_server_open(7014, Socket),
   socket_server_accept(Socket, Client, Stream, [type(binary)]).
^C^C^C^C^Z

Ideally, socket_server_accept/4 can also be interrupted, much like read/1.

Hi there,

Thanks for this amazing module.

I think there is a problem with the way terms are printed.
I run some Prolog code from Python, querying Prolog with:

H = pyswip.Variable()
induce = pyswip.Functor('induce', 1)
q = Query(induce(H))
q.nextSolution()
print(H.value)

I get a result like this for H:

[Functor(319757,2,
 [Functor(9048461,3,_10560234,_10560236,_1056023