IXFR master logs each serial change unnecessarily

Knot DNS master logs a separate message for each serial update in the IXFR transfer. I think this is almost useless (at least at the info log level). Thoughts?

Master's log:

2014-12-12T00:33:25 info: [example.com] NOTIFY, outgoing, ::1@53001: serial 1526
2014-12-12T00:33:25 info: [example.com] IXFR, outgoing, ::1@33553: started, serial 1520 -> 1526
2014-12-12T00:33:25 info: [example.com] IXFR, outgoing, ::1@33553: serial 1520 -> 1521
2014-12-12T00:33:25 info: [example.com] IXFR, outgoing, ::1@33553: serial 1521 -> 1522
2014-12-12T00:33:25 info: [example.com] IXFR, outgoing, ::1@33553: serial 1522 -> 1523
2014-12-12T00:33:25 info: [example.com] IXFR, outgoing, ::1@33553: serial 1523 -> 1524
2014-12-12T00:33:25 info: [example.com] IXFR, outgoing, ::1@33553: serial 1524 -> 1525
2014-12-12T00:33:25 info: [example.com] IXFR, outgoing, ::1@33553: serial 1525 -> 1526
2014-12-12T00:33:25 info: [example.com] IXFR, outgoing, ::1@33553: finished, 0.00 seconds, 1 messages, 18167 bytes

Slave's log:

2014-12-12T00:33:25 info: [example.com] NOTIFY, incoming, ::1@43695: received serial 1526
2014-12-12T00:33:25 info: [example.com] refresh, outgoing, ::1@53000: master has newer serial 1520 -> 1526
2014-12-12T00:33:25 info: [example.com] IXFR, incoming, ::1@53000: starting
2014-12-12T00:33:25 info: [example.com] IXFR, incoming, ::1@53000: finished, 0.36 seconds, 1 messages, 18167 bytes