diffsync ready message from hub always results in a retry right now, which means many pointless errors.; also slightly improve hub logging messages.
diffsync ready message from hub always results in a retry right now, which means many pointless errors.; also slightly improve hub logging messages.

sagemathinc/smc,sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc,tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,sagemathinc/smc