What is 5.4 p2 ?

[Paul Dufresne]

> and more curious. I updated one of my systems to 5.4 p2 today

Being a newcomer to FreeBSD, I understand about Release version,
STABLE version and CURRENT one. But I don't understand this
p2 you are refering to.
I could guess it means point release 2, so I checked:
http://www.freebsd.org/where.html
But files seems to be for 5.4-RELEASe still from May 8.

So what is 5.4 p2 ?

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