.c files only need to import psycopg.h: it will in turn import
dependencies from Python and libpq and configure.h. psycopg.h should be
the first to be imported, so the basic imports are not required in
the .h's
As a guideline I'm trying to import from the most specific to the most
generic to detect missing imports in the .h's.
By James Henstridge on 2008-07-23.
Merged from lp:~jamesh/psycopg/two-phase-commit/revision/356
* psycopg/connection_type.c (psyco_conn_xid): add a
Connection.xid() method that instantiates Xid objects.
* psycopg/psycopgmodule.c (init_psycopg): initialise the Xid
object type.
* psycopg/xid.h:
* psycopg/xid_type.c: Implement a basic transaction ID object for
use in two phase commit.
