Merge branch 'find-local-repos-with-jmdns' into 'master'
Find local repos with jmdns
This enables users to find local repos on local wifi using mDNS. Local repos can be advertized according to a preference, and you can find local repos by browsing via mDNS in `ManageRepos` under the "Find Local Repos".
This also includes fixes for the `SignedRepoUpdater` tests, and comments out other tests that have not yet worked.