oxenstored: Fix spelling of "persistent" config variable

Change "persistant" to "persistent", in the code and the
example/default config.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

tools/ocaml/xenstored/oxenstored.conf

@@ -20,7 +20,7 @@ quota-maxwatch = 100
 quota-transaction = 10
 
 # Activate filed base backend
-persistant = false
+persistent = false
 
 # Xenstored logs
 # xenstored-log-file = /var/log/xenstored.log

tools/ocaml/xenstored/xenstored.ml

@@ -86,7 +86,7 @@ let parse_config filename =
 		("quota-maxentity", Config.Set_int Quota.maxent);
 		("quota-maxsize", Config.Set_int Quota.maxsize);
 		("test-eagain", Config.Set_bool Transaction.test_eagain);
-		("persistant", Config.Set_bool Disk.enable);
+		("persistent", Config.Set_bool Disk.enable);
 		("xenstored-log-file", Config.Set_string Logging.xenstored_log_file);
 		("xenstored-log-level", Config.String
 			(fun s -> Logging.xenstored_log_level := Logging.level_of_string s));