Fixed test-static-http with http_proxy variable set.

tests/test-static-http

@@ -1,41 +1,41 b''
 #!/bin/sh
 
 hg clone old-http://localhost:20059/ copy
 echo $?
 ls copy
 
 # This server doesn't do range requests so it's basically only good for
 # one pull
 cat > dumb.py <<EOF
 import BaseHTTPServer, SimpleHTTPServer, signal
 
 def run(server_class=BaseHTTPServer.HTTPServer,
         handler_class=SimpleHTTPServer.SimpleHTTPRequestHandler):
     server_address = ('localhost', 20059)
     httpd = server_class(server_address, handler_class)
     httpd.serve_forever()
 
 signal.signal(signal.SIGTERM, lambda x: sys.exit(0))
 run()
 EOF
 
 python dumb.py 2>/dev/null &
 
 mkdir remote
 cd remote
 hg init
 echo foo > bar
 hg add bar
 hg commit -m"test" -d"0 0"
 hg tip
 
 cd ..
 
-hg clone old-http://localhost:20059/remote local
+http_proxy= hg clone old-http://localhost:20059/remote local
 
 cd local
 hg verify
 cat bar
 hg pull
 
 kill $!