This simple query allows you to ditch rolling your own
state machine for handling async pgsql states and instead
asks you to provide 3 functions:
- init
- results
- done
You can see the different in complexity in the pgsql example,
which now contains a pgsql_simple.c holding the same asynchronous
query as in pgsql.c but using the simple pgsql api.
You can of course still roll your own in case you want more control.
Gone is the ugly KORE_PGSQL macro that hid an overly complex
state machine for the pgsql api.
Gone is the pgsql array that was attached to http_requests.
Gone are the callback hacks inside the pgsql api.
Instead, I strongly encourage people to use the new state machine
api Kore offers to properly deal with asynchronous queries.
The pgsql example in examples/pgsql has been updated to reflect
these changes.
