We need to use six.string_types in a few other places to account for the...

We need to use six.string_types in a few other places to account for the change in ZConfig. unix_domain_sockets() was failing before this on Python 2.

.travis.yml

@@ -5,7 +5,7 @@ matrix:
         - os: linux
           python: 2.7
         - os: linux
-          python: pypy-5.4.1
+          python: pypy-5.6.0
         - os: linux
           python: 3.4
         - os: linux

src/ZEO/ClientStorage.py

@@ -190,10 +190,10 @@ class ClientStorage(ZODB.ConflictResolution.ConflictResolvingStorage):
 
         self.__name__ = name or str(addr) # Standard convention for storages
 
-        if isinstance(addr, str):
+        if isinstance(addr, six.string_types):
             addr = [addr]
         elif (isinstance(addr, tuple) and len(addr) == 2 and
-              isinstance(addr[0], str) and isinstance(addr[1], int)):
+              isinstance(addr[0], six.string_types) and isinstance(addr[1], int)):
             addr = [addr]
 
         logger.info(

src/ZEO/tests/forker.py

@@ -53,7 +53,7 @@ class ZEOConfig(object):
             else:
                 self.logpath = 'server.log'
 
-        if not isinstance(addr, str):
+        if not isinstance(addr, six.string_types):
             addr = '%s:%s' % addr
 
         self.log = log