network: synced patch with upstream

After https://github.com/yast/yast-network/pull/76 a workaround is
no longer necessary.
network: remove breaks after returns

no longer necessary with
"Also allow |return| to end a |case| clause"
https://github.com/yast/y2r/commit/686107b475a9d31d8ea4dc3e4c468c9c26d59159
network: fixed a "typo" warning in `moves`

an entry was there twice so it did not match the second time
build order: fixed grammar in message
Merge pull request #204 from mvidner/network

Network: fixed by syncing with upstream; more improvements by removals.