3d2c7d6f94 Add regtest for JSON-RPC batch calls. (Daniel Kraft)
Pull request description:
This adds a new regtest file `interface_rpc.py`, containing a test for batch JSON-RPC requests. Those were previously not tested at all. Tests for basic requests are not really necessary, as those are used anyway in lots of other regtests.
The existing `interface_http.py` file is more about the underlying HTTP connection, so adding a new interface file for the JSON-RPC specific things makes sense.
Tree-SHA512: 7c7576004c8474e23c98f4bf25fb655328ba6bb73ea06744ebee1c0ffbb26bc132e621ae52955d51dab0803b322f8d711667626a777ac9b26003339c2484502f
