When was '-z' added to tcpdump?

[Osman Surkatty <osman () surkatty org>]

Hello there,

I would like to use the -z (*postrotate-command*) flag to easily gzip a
pcap after a file rotation but it appears my current version (tcpdump 3.9.4
/ libpcap 0.9.4) does not support this. I was wondering what version first
incorporated this flag? The official tcpdump changelog (
http://www.tcpdump.org/tcpdump-changes.txt) doesn't appear to have any note
on this feature's introduction either. I would gladly appreciate it if
somebody could provide details on when exactly this feature was added.

Thank you.

Regards,
Osman Surkatty
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