40network: Fix the syntax to correct the judgment sentence

In the judgment sentence, it will print the following warning message,
becasuse of lacking the blank on the left of ']'.

/lib/net-lib.sh: line 110: [: missing `]'

Signed-off-by: Minfei Huang <mhuang@redhat.com>
initrd-release: move from /etc to /usr/lib

This mimicks the similar move of os-release which was done in systemd. These
files are not configuration, but part of the OS.

Still symlinks are in place for compatibility, but those should probably be
dropped eventually.