Commit cc493a52a46271df82dbebea26038502b85788b9 added
a constraint to network connect/disconnect operations
on "Swarm scoped" networks.
This adds those errors to the API documentation. Also
changes the error to lowercase for consistency.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: b0089e48272f18d856ba147b393371c18d5683fb
Component: engine