possible fix for halting and catching fire after ~10,000 messages

i was seeing imap2maildir spinning and eating all available memory
after a few hours of operation.  after review, i suspect it is because:

in imaplib.IMAP4_SSL:
    def readline(self):
        line = []
        while 1:
            char = self.sslobj.read(1)
            line.append(char)
            if char == "\n": return ''.join(line)

in ssl.SSLSocket:
    def read(self, len=1024):
        try:
            return self._sslobj.read(len)
        except SSLError, x:
            if x.args[0] == SSL_ERROR_EOF and self.suppress_ragged_eofs:
                return ''
            else:
                raise

guess what suppress_ragged_eofs defaults to, win a prize!

simpleimap.py

@@ -246,6 +246,17 @@ class SimpleImap(imaplib.IMAP4, __simplebase):
     pass
 
 class SimpleImapSSL(imaplib.IMAP4_SSL, __simplebase):
+    def readline(self):
+        """Read line from remote.  Overrides built-in method to fix
+        infinite loop problem when EOF occurs, since sslobj.read
+        returns '' on EOF."""
+        line = []
+        while 1:
+            self.sslobj.suppress_ragged_eofs = False
+            char = self.sslobj.read(1)
+            line.append(char)
+            if char == "\n": return ''.join(line)
+
     def read(self, n):
         if 'Windows' in platform.platform():
             maxRead = 1000000