Merged revisions 83371,83390 via svnmerge from
svn+ssh://svn.python.org/python/branches/py3k

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  r83371 | georg.brandl | 2010-07-31 23:54:24 +0200 (Sa, 31 Jul 2010) | 1 line

  #8292: Fix three instances of truth tests on return values of filter() (which is always true in Python 3).
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  r83390 | georg.brandl | 2010-08-01 10:07:49 +0200 (So, 01 Aug 2010) | 1 line

  #8230: make Lib/test/sortperf.py run on Python 3.
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diff --git a/Lib/http/server.py b/Lib/http/server.py
index f6f788f..930831c 100644
--- a/Lib/http/server.py
+++ b/Lib/http/server.py
@@ -1015,8 +1015,9 @@
         if ua:
             env['HTTP_USER_AGENT'] = ua
         co = filter(None, self.headers.get_all('cookie', []))
-        if co:
-            env['HTTP_COOKIE'] = ', '.join(co)
+        cookie_str = ', '.join(co)
+        if cookie_str:
+            env['HTTP_COOKIE'] = cookie_str
         # XXX Other HTTP_* headers
         # Since we're setting the env in the parent, provide empty
         # values to override previously set values