fix: send http requests in origin not absolute form

Absolute form is meant for proxies and for example
nginx rejects it with 400 if the host contains an underscore, breaking autoconfig discovery.

deltachat-rpc-client/src/deltachat_rpc_client/pytestplugin.py

@@ -363,10 +363,7 @@ def remote_bob_loop(channel):
         # ACFactory would configure from a "dcaccount" QR,
         # which old cores cannot use on underscore domains
         bob = dc.add_account()
-        bob.set_config_from_qr(dclogin_qr)
-        if not bob.is_configured():
-            # cores <=2.22 only store login values from a "dclogin" QR
-            bob.configure()
+        bob.add_transport_from_qr(dclogin_qr)
         bob.bring_online()
 
         alice_vcard = channel.receive()