This elevates a problem with newer SMB protocol versions and smbclient
not supporting discovery/browsing. when not using older (as in:
ancient) protocol versions discovery doesn't work and smb:/ gives no
By falling back to DNSSD based discovery we can ensure discovery of DNSSD
remotes (namely linux and osx) is always working. Windows unfortunately
does not support DNSSD and as such will not benefit from this mode of
discovery and continue to be unlisted when using a protocol version
without browsing support.
CHANGELOG: When SMB Discovery is not working (protocol > SMB1) host discovery will now fall back to DNS-SD/Avahi/Bonjour.