Merge pull request docker#10349 from thaJeztah/18.03_backport_fetch_r…

…esources_use_tags

[18.03 backport] fetch resources use tags

Merge pull request docker#10196 from thaJeztah/18.09_backport_fetch_r…

…esources_use_tags

[18.09 backport] Use tags where possible to fetch API documentation for older versions

Ruby Ver Bump (docker#10040) (docker#10043)

Ruby Ver Bump (docker#10040) (docker#10044)

Ruby Ver Bump (docker#10040) (docker#10045)

Ruby Ver Bump (docker#10040) (docker#10046)

v18.09

Merge pull request docker#7760 from thaJeztah/fix_reference_links

Fix broken links in 1.7 archive

Merge pull request docker#705 from docker/tag-pruning-684

Tag pruning 684

Dockerfile.build: fix apk invocation

Use --no-cache flag to
 - avoid doing cache update;
 - leaving metadata in the resulting image).

Per https://github.com/gliderlabs/docker-alpine/blob/master/docs/usage.md#disabling-cache

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>