Added ability to disable fsync()

Passed config to LocalStatus and Maildir folders so they can look
up the fsync status

offlineimap/folder/Maildir.py

@@ -45,8 +45,10 @@ def gettimeseq():
         timelock.release()
 
 class MaildirFolder(BaseFolder):
-    def __init__(self, root, name, sep, repository, accountname):
+    def __init__(self, root, name, sep, repository, accountname, config):
         self.name = name
+        self.config = config
+        self.dofsync = config.getdefaultboolean("general", "fsync")
         self.root = root
         self.sep = sep
         self.messagelist = None
@@ -183,7 +185,8 @@ class MaildirFolder(BaseFolder):
 
         # Make sure the data hits the disk
         file.flush()
-        os.fsync(file.fileno())
+        if self.dofsync:
+            os.fsync(file.fileno())
 
         file.close()
         if rtime != None: