5 files changed, 33 insertions, 11 deletions
diff --git a/django/core/mail.py b/django/core/mail.py
index cc99659adb..b9966c2af0 100644
--- a/django/core/mail.py
+++ b/django/core/mail.py
@@ -3,7 +3,8 @@
 from django.conf import settings
 from email.MIMEText import MIMEText
 from email.Header import Header
-import smtplib, rfc822
+from email.Utils import formatdate
+import smtplib
 import socket
 import time
 import random
@@ -33,21 +34,34 @@ class SafeMIMEText(MIMEText):
             val = Header(val, settings.DEFAULT_CHARSET)
         MIMEText.__setitem__(self, name, val)
 
-def send_mail(subject, message, from_email, recipient_list, fail_silently=False, auth_user=settings.EMAIL_HOST_USER, auth_password=settings.EMAIL_HOST_PASSWORD):
+def send_mail(subject, message, from_email, recipient_list, fail_silently=False, auth_user=None, auth_password=None):
     """
     Easy wrapper for sending a single message to a recipient list. All members
     of the recipient list will see the other recipients in the 'To' field.
+
+    If auth_user is None, the EMAIL_HOST_USER setting is used.
+    If auth_password is None, the EMAIL_HOST_PASSWORD setting is used.
     """
+    if auth_user is None:
+        auth_user = settings.EMAIL_HOST_USER
+    if auth_password is None:
+        auth_password = settings.EMAIL_HOST_PASSWORD
     return send_mass_mail([[subject, message, from_email, recipient_list]], fail_silently, auth_user, auth_password)
 
-def send_mass_mail(datatuple, fail_silently=False, auth_user=settings.EMAIL_HOST_USER, auth_password=settings.EMAIL_HOST_PASSWORD):
+def send_mass_mail(datatuple, fail_silently=False, auth_user=None, auth_password=None):
     """
     Given a datatuple of (subject, message, from_email, recipient_list), sends
     each message to each recipient list. Returns the number of e-mails sent.
 
     If from_email is None, the DEFAULT_FROM_EMAIL setting is used.
     If auth_user and auth_password are set, they're used to log in.
+    If auth_user is None, the EMAIL_HOST_USER setting is used.
+    If auth_password is None, the EMAIL_HOST_PASSWORD setting is used.
     """
+    if auth_user is None:
+        auth_user = settings.EMAIL_HOST_USER
+    if auth_password is None:
+        auth_password = settings.EMAIL_HOST_PASSWORD
     try:
         server = smtplib.SMTP(settings.EMAIL_HOST, settings.EMAIL_PORT)
         if auth_user and auth_password:
@@ -65,7 +79,7 @@ def send_mass_mail(datatuple, fail_silently=False, auth_user=settings.EMAIL_HOST
         msg['Subject'] = subject
         msg['From'] = from_email
         msg['To'] = ', '.join(recipient_list)
-        msg['Date'] = rfc822.formatdate()
+        msg['Date'] = formatdate()
         try:
             random_bits = str(random.getrandbits(64))
         except AttributeError: # Python 2.3 doesn't have random.getrandbits().
diff --git a/django/core/validators.py b/django/core/validators.py
index a2f3dc3bc3..ebfbd3961e 100644
--- a/django/core/validators.py
+++ b/django/core/validators.py
@@ -312,11 +312,12 @@ class RequiredIfOtherFieldGiven(RequiredIfOtherFieldsGiven):
         RequiredIfOtherFieldsGiven.__init__(self, [other_field_name], error_message)
 
 class RequiredIfOtherFieldEquals(object):
-    def __init__(self, other_field, other_value, error_message=None):
+    def __init__(self, other_field, other_value, error_message=None, other_label=None):
         self.other_field = other_field
         self.other_value = other_value
+        other_label = other_label or other_value
         self.error_message = error_message or lazy_inter(gettext_lazy("This field must be given if %(field)s is %(value)s"), {
-            'field': other_field, 'value': other_value})
+            'field': other_field, 'value': other_label})
         self.always_test = True
 
     def __call__(self, field_data, all_data):
@@ -324,11 +325,12 @@ class RequiredIfOtherFieldEquals(object):
             raise ValidationError(self.error_message)
 
 class RequiredIfOtherFieldDoesNotEqual(object):
-    def __init__(self, other_field, other_value, error_message=None):
+    def __init__(self, other_field, other_value, other_label=None, error_message=None):
         self.other_field = other_field
         self.other_value = other_value
+        other_label = other_label or other_value
         self.error_message = error_message or lazy_inter(gettext_lazy("This field must be given if %(field)s is not %(value)s"), {
-            'field': other_field, 'value': other_value})
+            'field': other_field, 'value': other_label})
         self.always_test = True
 
     def __call__(self, field_data, all_data):
diff --git a/django/db/backends/postgresql/base.py b/django/db/backends/postgresql/base.py
index 054f74a0d3..2342539a6f 100644
--- a/django/db/backends/postgresql/base.py
+++ b/django/db/backends/postgresql/base.py
@@ -60,7 +60,9 @@ class DatabaseWrapper(local):
 
     def cursor(self):
         from django.conf import settings
+        set_tz = False
         if self.connection is None:
+            set_tz = True
             if settings.DATABASE_NAME == '':
                 from django.core.exceptions import ImproperlyConfigured
                 raise ImproperlyConfigured, "You need to specify DATABASE_NAME in your Django settings file."
@@ -76,7 +78,8 @@ class DatabaseWrapper(local):
             self.connection = Database.connect(conn_string, **self.options)
             self.connection.set_isolation_level(1) # make transactions transparent to all cursors
         cursor = self.connection.cursor()
-        cursor.execute("SET TIME ZONE %s", [settings.TIME_ZONE])
+        if set_tz:
+            cursor.execute("SET TIME ZONE %s", [settings.TIME_ZONE])
         cursor = UnicodeCursorWrapper(cursor, settings.DEFAULT_CHARSET)
         if settings.DEBUG:
             return util.CursorDebugWrapper(cursor, self)
diff --git a/django/db/backends/postgresql_psycopg2/base.py b/django/db/backends/postgresql_psycopg2/base.py
index 04322332dc..cfddb96bee 100644
--- a/django/db/backends/postgresql_psycopg2/base.py
+++ b/django/db/backends/postgresql_psycopg2/base.py
@@ -28,7 +28,9 @@ class DatabaseWrapper(local):
 
     def cursor(self):
         from django.conf import settings
+        set_tz = False
         if self.connection is None:
+            set_tz = True
             if settings.DATABASE_NAME == '':
                 from django.core.exceptions import ImproperlyConfigured
                 raise ImproperlyConfigured, "You need to specify DATABASE_NAME in your Django settings file."
@@ -45,7 +47,8 @@ class DatabaseWrapper(local):
             self.connection.set_isolation_level(1) # make transactions transparent to all cursors
         cursor = self.connection.cursor()
         cursor.tzinfo_factory = None
-        cursor.execute("SET TIME ZONE %s", [settings.TIME_ZONE])
+        if set_tz:
+            cursor.execute("SET TIME ZONE %s", [settings.TIME_ZONE])
         if settings.DEBUG:
             return util.CursorDebugWrapper(cursor, self)
         return cursor
diff --git a/django/utils/datastructures.py b/django/utils/datastructures.py
index 9bec7a5df7..c20da05144 100644
--- a/django/utils/datastructures.py
+++ b/django/utils/datastructures.py
@@ -17,7 +17,7 @@ class MergeDict(object):
     def __contains__(self, key):
         return self.has_key(key)
 
-    def get(self, key, default):
+    def get(self, key, default=None):
         try:
             return self[key]
         except KeyError: