Improve the help text for ChanServ SET SUCCESSOR.

modules/commands/cs_set.cpp

@@ -1017,12 +1017,18 @@ class CommandCSSetSuccessor : public Command
 		source.Reply(_("Changes the successor of a channel. If the founder's\n"
 				"nickname expires or is dropped while the channel is still\n"
 				"registered, the successor will become the new founder of the\n"
-				"channel. The new nickname must be a registered one."));
+				"channel. The successor's nickname must be a registered one.\n"
+				"If there's no successor set, then the first nickname on the\n"
+				"access list (with the highest access, if applicable) will\n"
+				"become the new founder, but if the access list is empty, the\n"
+				"channel will be dropped."));
 		unsigned max_reg = Config->GetModule("chanserv")->Get<unsigned>("maxregistered");
 		if (max_reg)
-			source.Reply(_("However, if the successor already has too many\n"
-				"channels registered (%d), the channel will be dropped\n"
-				"instead, just as if no successor had been set."), max_reg);
+			source.Reply(" ");
+			source.Reply(_("Note, however, if the successor already has too many\n"
+				"channels registered (%d), they will not be able to\n"
+				"become the new founder and it will be as if the\n"
+				"channel had no successor set."), max_reg);
 		return true;
 	}
 };