The first batch of changes recommended by the fixdiv tool.  These are
mostly changes of / operators into //.  Once or twice I did more or
less than recommended.
diff --git a/Lib/rfc822.py b/Lib/rfc822.py
index b3f7fb2..430e637 100644
--- a/Lib/rfc822.py
+++ b/Lib/rfc822.py
@@ -927,7 +927,7 @@
             tzoffset = -tzoffset
         else:
             tzsign = 1
-        tzoffset = tzsign * ( (tzoffset/100)*3600 + (tzoffset % 100)*60)
+        tzoffset = tzsign * ( (tzoffset//100)*3600 + (tzoffset % 100)*60)
     tuple = (yy, mm, dd, thh, tmm, tss, 0, 0, 0, tzoffset)
     return tuple