Launchpad automatic translations update.
[FIX] mail.thread: avoid wrongly matching model,id from a foreign OpenERP system

When emails transit from an OpenERP system to another
there is a chance of wrongly considering the foreign
model,id pair as local, possibly attaching a reply
to a wrong parent message.
This naive heuristic ignore the foreign identifiers
unless the hostname of the message-id mentioned in
the In-Reply-To header matches the local one.
This may fail after a change of local hostname but
is still better than the alternative.
In OpenERP v8 we should stop including the model,res_id
in outgoing Message-Id headers and only rely on the
stored, opaque, unique Message-Ids, preventing
any future mismatch.
[FIX] 500 error on connection when using PyWebDAV 0.9.4
(and maybe others)

Courtesy of Holger Brunn (Therp)
[FIX] mail.thread: avoid overwriting thread_id/model with foreign values when reply-to hostname does not match + fix tests

This improve previous commit by making sure we
never consider the thread_id/model values in the
In-Reply-To/References header if the host name
did not match.
Also fixes the tests that were using the
6.1 compatibility mode to post in a mail group
thread instead of specifying the right
message-id.