Add a common license footer for docs about docs

[rgregg]

Anyone have a script that makes adding this easier than a copy and paste across 30-40 files?

[dewitt]

for f in **/*.md; do
  cat << EOF >> $f

Except as otherwise noted, the content of this page is licensed under the
[Creative Commons Attribution 4.0 License](https://creativecommons.org/licenses/by/4.0/),
and code samples are licensed under the
[Apache 2.0 License](https://www.apache.org/licenses/LICENSE-2.0).
EOF
done

(Caveat, not tested. )

[rgregg]

Tweaked it slightly, just to add a separator.

for f in **/*.md; do
  cat << EOF >> $f

---

Except as otherwise noted, the content of this page is licensed under the
[Creative Commons Attribution 4.0 License](https://creativecommons.org/licenses/by/4.0/),
and code samples are licensed under the
[Apache 2.0 License](https://www.apache.org/licenses/LICENSE-2.0).
EOF
done