RELENG_6_1

[Rong-En Fan]

Hi,

According to the webpage [1], 6.1 has been branched on April 5. However,
I noticed that there is a tag called RELENG_6_1, not a branch called
RELENG_6_1. For example, sys/conf/newvers.sh [2], rev 1.69.2.11,
is on RELENG_6 branch with tag RELENG_6_1_BP and RELENG_6_1.

It is a bit strange for me. At least, we have RELENG_X_Y branch before
and RELENG_X_Y_BP tag. Is there any special reason that we have
a tag instead of a branch for 6.1?

Regards,
Rong-En Fan

[1] http://www.freebsd.org/releases/6.1R/schedule.html
[2] http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/conf/newvers.sh