[Bro] conn.log history has letter 'Q'?

[김희철]

Hi Bro community
I am using bro version 2.3-316

In side a Conn.log history I have letter 'Q' in it.
I can not find any info about 'Q'
am I missing something?

1439941988.068044 C3FNvf40Sa0n7jtNTf 10.122.100.26 63394 10.122.110.8 22
tcp - 1.796387 0 0 SH T Qah 1 60 4 224 (empty) (empty) (empty)

1439942990.248722 CqADp939XKyVf7j03i 10.122.100.26 63119 10.122.103.10 22
tcp - 3.000317 0 0 S2 T Qh 1 60 4 240 (empty) (empty) (empty)
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