HC Reload operation variety that does not restart servers

bstansberry: I have that reload op that restarts everything, that's a 3rd case
[15:40] bstansberry: the final variant is something like adding a param to the HC reload op such that it doesn't stop servers
[15:40] bstansberry: it just reloads itself and the servers somehow sync back up
[15:40] bstansberry: which is meant to work but, well, who knows
[15:41] kkhan: Yeah, we had some stuff for that
[15:42] bstansberry: that can be nice for scenarios like
[15:43] bstansberry: DC dies and can't be revived for some reason
[15:43] bstansberry: :reload HC into admin-only but don't restart servers
[15:43] bstansberry: tweak config to make the HC master, get the domain.xml in place
[15:43] bstansberry: :reload again out of admin-only, servers reconnect, we have a new DC
[15:44] bstansberry: that's a pretty convoluted case though, so we can defer to Final