Errors from update_client_ips on python3

[richvdh]

2018-09-17 16:04:09,868 - synapse.storage._base - 282 - DEBUG - update_client_ips-0- [TXN FAIL] {_update_client_ips_batch-ef} operator does not exist: text = bytea
LINE 1: ...E user_ips SET last_seen = 1537196648240 WHERE ip = 'x32303...
                                                             ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

2018-09-17 16:18:53,367 - synapse.storage._base - 120 - DEBUG - update_client_ips-0- [SQL FAIL] {_update_client_ips_batch-c9} operator does not exist: text = bytea
LINE 1: ...bot:sw1v.org' AND device_id = 'GKZJFESERK' AND ip = 'x32613...
                                                             ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

Also: it looks like this is only being logged at DEBUG. if update_client_ips is failing, it needs to log at ERROR or above.