[OE-core] Why hostname is not in /etc/hosts?

[Marcin Juszkiewicz]

When I start Apache on my target I get this:

AH00557: httpd: apr_sockaddr_info_get() failed for genericarmv8
AH00558: httpd: Could not reliably determine the server's fully
qualified domain name, using 127.0.0.1. Set the 'ServerName' directive
globally to suppress this message

Solution is "echo '127.0.0.1 genericarmv8' >>/etc/hosts" but this is not
what I would like to have to do on each first boot.

I looked more and found that /etc/hostname is set in base-files
(package_arch:machine) while /etc/hosts is in netbase
(package_arch:$arch (while package_arch:all would be enough)).

One solution which comes to my mind is to add $MACHINE entry in netbase
and make it p_arch:$MACHINE.

Other is do that in postinst but this will generate more work as upgrade
paths should not be broken.

Any other ideas?