Update contributed man page file names and compilation script for the eventual possibility of non-man1 man pages (hopefully a Dockerfile.5.md, for example)

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
don't try allocating a port to upload a docs release to s3

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5346 from SvenDowideit/dont-alocate-port-for-docs-release

Remove port allocation from `make docs-release`
fixed broken link to chef community site
Merge pull request #5352 from rmoriz/patch-1

Merged.
Merge pull request #5337 from tianon/man1-assumption

Update contributed man page file names and compilation script