Relocated non-mercurial imports before Mercurial ones, to perform them

before demandimport may strike.

mercurial_keyring.py

@@ -51,6 +51,13 b' backend (by default keyring guesses, usu'
 you get KDE Wallet under KDE, and Gnome Keyring under Gnome or Unity).
 '''
 
+import urllib2
+import smtplib
+import socket
+import os
+import sys
+import re
+
 from mercurial import util, sslutil
 from mercurial.i18n import _
 from mercurial.url import passwordmgr
@@ -58,13 +65,6 b' from mercurial import mail'
 from mercurial.mail import SMTPS, STARTTLS
 from mercurial import encoding
 
-import urllib2
-import smtplib
-import socket
-import os
-import sys
-import re
-
 # pylint: disable=invalid-name, line-too-long, protected-access, too-many-arguments
 
 ###########################################################################
@@ -140,7 +140,6 b' def import_keyring():'
         meu.disable_logging("keyring")
     return mod
 
-
 #################################################################
 # Actual implementation
 #################################################################