Matt Moore d5ca577ad1 Allow hostname components in component names. ...

Fixes https://github.com/docker/distribution/issues/1062

This relaxes the naming restrictions places on Docker images to permit
valid hostnames according to [RFC-2396](https://www.ietf.org/rfc/rfc2396.txt).

It deviates from the RFC in the following ways:
 1) Allow underscores where we allow hyphens (hostnames don't allow
 underscores, which we must for backwards compatibility).
 2) Leave "top-level" name segments unrestricted (domains require an
 alpha character to begin a top-level domain, e.g. "com").
 3) DO NOT allow a trailing dot, as permitted by FQDNs.

Signed-off-by: Matt Moore <mattmoor@google.com>

2015-10-08 11:29:54 -07:00

docs

Allow hostname components in component names.

2015-10-08 11:29:54 -07:00

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