lock and unlock should now broadcast to the hall. Users trying to enter if hall is locked should now get message indicating the hall is locked. Removed redundant start with options. Browser requests mic permissions, also there is a mute option in the ui itself, so this seemed superfluous

hall/hall.go

@@ -549,7 +549,7 @@ func AddClient(hall string, c Client, creds ClientCredentials) (*Hall, error) {
 			if g.locked != nil {
 				m := *g.locked
 				if m == "" {
-					m = "this hall is locked"
+					m = "Hall is locked."
 				}
 				return nil, UserError(m)
 			}
@@ -632,7 +632,7 @@ func autoLockKick(g *Hall) {
 		}
 	}
 	if g.description.Autolock && g.locked == nil {
-		m := "this hall is locked"
+		m := "Hall is locked."
 		g.locked = &m
 		for _, c := range clients {
 			c.Joined(g.Name(), "change")