In #4740, the apt-key call in docs is changed to use the keyserver port 80 instead of port 11371, as the previous call would fail with a restrictive firewall or proxy. This commit extends the change to all apt-key calls in the repository. Docker-DCO-1.1-Signed-off-by: Viktor Vojnovski <vojnovski@gmail.com> (github: vojnovski) Upstream-commit: 4fd82db4beba03a126dfc557c86d5d52e9066dae Component: engine