Matt Moore 20c4b7a180 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 16:51:47 -07:00
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errcode	Make Error.Error() return the post-arg-substitution Message	2015-07-22 12:44:59 -07:00
v2	Allow hostname components in component names.	2015-10-08 16:51:47 -07:00