libsmbconf: add open and close operations to the smbconf_ops.

Note: currently, reg_init_smbconf opens the registry, but does
not close it. This has to be changed. so that it is closed.
And then libsmbconf will need these open/close functions

Michael
(This used to be commit 77dbdf82ef)

source3/lib/smbconf/smbconf.c

@@ -395,7 +395,7 @@ done:
 
 static int smbconf_destroy_ctx(struct smbconf_ctx *ctx)
 {
-	return regdb_close();
+	return ctx->ops->close_conf(ctx);
 }
 
 static WERROR smbconf_global_check(struct smbconf_ctx *ctx)
@@ -436,6 +436,16 @@ done:
 	return werr;
 }
 
+static WERROR smbconf_reg_open(struct smbconf_ctx *ctx)
+{
+	return regdb_open();
+}
+
+static int smbconf_reg_close(struct smbconf_ctx *ctx)
+{
+	return regdb_close();
+}
+
 /**
  * Get the change sequence number of the given service/parameter.
  * service and parameter strings may be NULL.
@@ -751,6 +761,8 @@ done:
 
 struct smbconf_ops smbconf_ops_reg = {
 	.init			= smbconf_reg_init,
+	.open_conf		= smbconf_reg_open,
+	.close_conf		= smbconf_reg_close,
 	.get_csn		= smbconf_reg_get_csn,
 	.drop			= smbconf_reg_drop,
 	.get_share_names	= smbconf_reg_get_share_names,

source3/lib/smbconf/smbconf_private.h

@@ -22,6 +22,8 @@
 
 struct smbconf_ops {
 	WERROR (*init)(struct smbconf_ctx *ctx);
+	WERROR (*open_conf)(struct smbconf_ctx *ctx);
+	int (*close_conf)(struct smbconf_ctx *ctx);
 	void (*get_csn)(struct smbconf_ctx *ctx, struct smbconf_csn *csn,
 			const char *service, const char *param);
 	WERROR (*drop)(struct smbconf_ctx *ctx);