[CentOS] Centos 7 License???

Today I did a yum upgrade to my kvm'ized Centos 7 test machine
(perhaps a bad day to do such a thing) and received new kernel
vmlinuz-3.10.0-229.1.2.el7.x86_64, among many other things. 
When I rebooted, I was asked to confirm (or renew, or some such)
my license.  My LICENSE ???

I was booting in text mode and the actions required were
a) unfamiliar, and b) hard to understand.

As I recall, I had to read the EULA - a worrisomely Microsoftian 
demand - and accept it.  Of course, the terms were pretty benign.
Then I had to continue.  I can't remember the exact language.
Of course, now when I reboot, all this cruft is gone.

Is this a cute April Fool joke?
If not, WTF is going on?

-- 
        David A. De Graaf    DATIX, Inc.    Hendersonville, NC
        dad at datix.us         www.datix.us


A: Because people read from top to bottom
Q: Why is top posting bad?