devserver: Listen for connections via IPv6

As the Internet runs out of IPv4 addresses, it's going to become
important to be able to update via IPv6.

BUG=chromium-os:13161
TEST=Run the devserver, have a client check for updates, verify that it still works

Change-Id: Ia41ed1582d352f187b507412ea55a92c68e86a02
Reviewed-on: http://gerrit.chromium.org/gerrit/1253
Tested-by: Aaron Plattner <[email protected]>
Reviewed-by: Chris Sosa <[email protected]>
diff --git a/devserver.py b/devserver.py
index ae40817..505ea5a 100755
--- a/devserver.py
+++ b/devserver.py
@@ -26,7 +26,7 @@
   base_config = { 'global':
                   { 'server.log_request_headers': True,
                     'server.protocol_version': 'HTTP/1.1',
-                    'server.socket_host': '0.0.0.0',
+                    'server.socket_host': '::',
                     'server.socket_port': int(options.port),
                     'server.socket_timeout': 6000,
                     'response.timeout': 6000,