bump from imaplib2 v2.53 to v2.55

- Expose more literals.
- Fix a type to bytes.
- Fix comment.

Changes submitted upstream by Łukasz and me.

Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>

README.md

@@ -83,7 +83,7 @@ Bugs, issues and contributions can be requested to both the mailing list or the
 * Python v2.7+
 * Python v3.4+ ***(experimental)***
 * six (required)
-* imaplib2 >= 2.53 (optional)
+* imaplib2 >= 2.55 (optional)
 
 
 ## Documentation

offlineimap/bundled_imaplib2.py

@@ -15,11 +15,12 @@ Public functions: Internaldate2Time
 
 
 __all__ = ("IMAP4", "IMAP4_SSL", "IMAP4_stream",
-           "Internaldate2Time", "ParseFlags", "Time2Internaldate")
+           "Internaldate2Time", "ParseFlags", "Time2Internaldate",
+           "Mon2num", "MonthNames", "InternalDate")
 
-__version__ = "2.53"
+__version__ = "2.55"
 __release__ = "2"
-__revision__ = "53"
+__revision__ = "55"
 __credits__ = """
 Authentication code contributed by Donn Cave <donn@u.washington.edu> June 1998.
 String method conversion by ESR, February 2001.
@@ -484,7 +485,7 @@ class IMAP4(object):
             import ssl
 
             TLS_MAP = {}
-            if hasattr(ssl, "PROTOCOL_TLSv1_2"):        # py3
+            if hasattr(ssl, "PROTOCOL_TLSv1_2"):
                 TLS_MAP[TLS_SECURE] = {
                     "tls1_2": ssl.PROTOCOL_TLSv1_2,
                     "tls1_1": ssl.PROTOCOL_TLSv1_1,
@@ -2293,7 +2294,10 @@ class _Authenticator(object):
         #  so when it gets to the end of the 8-bit input
         #  there's no partial 6-bit output.
         #
-        oup = ''
+        if bytes != str:
+            oup = b''
+        else:
+            oup = ''
         while inp:
             if len(inp) > 48:
                 t = inp[:48]

offlineimap/virtual_imaplib2.py

@@ -25,7 +25,7 @@ this virtual_imaplib2 or we might go into troubles.
 DESC = None
 
 _SUPPORTED_RELEASE = 2
-_SUPPORTED_REVISION = 53
+_SUPPORTED_REVISION = 55
 
 try:
     # Try any imaplib2 in PYTHONPATH first. This allows both maintainers of
@@ -42,14 +42,14 @@ except (ImportError, NameError) as e:
     try:
         from offlineimap.bundled_imaplib2 import *
         import offlineimap.bundled_imaplib2 as imaplib
+
         DESC = "bundled"
     except:
         print("Error while trying to import system imaplib2: %s"% e)
         raise
 
-# We should really get those literals exposed by upstream. Same goes for
-# __version__, __release__ and __revision__.
-InternalDate = imaplib.InternalDate
-Mon2num = imaplib.Mon2num
-MonthNames = imaplib.MonthNames
+# Upstream won't expose those literals to avoid erasing them with "import *" in
+# case they exist.
 __version__ = imaplib.__version__
+__release__ = imaplib.__release__
+__revision__ = imaplib.__revision__