Add jail_osname and delay_osname to list of fields user can specify

for the experiments table.

db/xmlconvert.in

@@ -78,6 +78,8 @@ my %experiment_fields = ("multiplex_factor"		=> 1,
 			 "cpu_usage"			=> 1,
 			 "mem_usage"			=> 1,
 			 "veth_encapsulate"		=> 1,
+			 "jail_osname"			=> 1,
+			 "delay_osname"			=> 1,
 			 "sync_server"			=> 1);
 
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