Fixesdocker/cli#4648
Make it easier to specify IPv6 addresses in the '--add-host' option by
permitting 'host=ip' in addition to 'host:ip', and allowing square
brackets around the address.
For example:
--add-host=hostname:127.0.0.1
--add-host=hostname:::1
--add-host=hostname=::1
--add-host=hostname=[::1]
Signed-off-by: Rob Murray <rob.murray@docker.com>
BuildKit's gitutil package behaves slightly differently than moby's
urlutil, so we should rely on BuildKit's gitutil when detecting URLs to
avoid cases of accidentally producing invalid build requests that can
confuse users.
Signed-off-by: Justin Chadwell <me@jedevc.com>
