dmesg suddenly fails when run as normal user on FC39

[Ron Flory]

Hi-

does not happen on FC38, or any prior RedHat/Fedora version since 
forever.

dmesg
    dmesg: read kernel buffer failed: Operation not permitted

Userspace scripts (such as used to read pics from cameras & sdcards) 
and many progs often use dmesg to detect or identify things like startup 
probe info, USB devs, partition numbers etc.

I worked around this by setting the suid bit of `which dmesg`, but it 
would be rude to force everybody to manually do this as part of 
post-install cleanup.

Hopefully an unintended side-effect and not a new "feature" that 
wasn't thought through completely.  A web-search suggests debian/ubuntu 
may have been doing this for awhile- but we really don't need to be just 
like them...    ;)