partial fix for bug 20366 - imap folder rename problem; rename OnCloseFolder to ForceDBClose; r=bienvenu

mailnews/base/public/nsIMsgFolder.idl

@@ -114,7 +114,7 @@ interface nsIMsgFolder : nsIFolder {
    */
 	readonly attribute nsIMsgFolder rootFolder;
   
-	void OnCloseFolder ();
+	void ForceDBClosed ();
 	void Delete ();
 
 	void deleteSubFolders(in nsISupportsArray folders);

mailnews/base/util/nsMsgFolder.cpp

@@ -889,7 +889,7 @@ NS_IMETHODIMP nsMsgFolder::GetShowDeletedMessages(PRBool *showDeletedMessages)
 }
 
 
-NS_IMETHODIMP nsMsgFolder::OnCloseFolder ()
+NS_IMETHODIMP nsMsgFolder::ForceDBClosed ()
 {
 	return NS_OK;
 }

mailnews/base/util/nsMsgFolder.h

@@ -83,7 +83,7 @@ public:
   NS_IMETHOD GetCanFileMessages(PRBool *aCanFileMessages);
   NS_IMETHOD GetCanCreateSubfolders(PRBool *aCanCreateSubfolders);
   NS_IMETHOD GetCanRename(PRBool *aCanRename);
-  NS_IMETHOD OnCloseFolder(void);
+  NS_IMETHOD ForceDBClosed(void);
   NS_IMETHOD Delete(void);
   NS_IMETHOD DeleteSubFolders(nsISupportsArray *folders);
   NS_IMETHOD PropagateDelete(nsIMsgFolder *folder, PRBool deleteStorage);