Backported from X.org:

 commit 2d67ada3c4079a11c52024a9c3d4138becca5171
 Author: Pauli Nieminen <ext-pauli.nieminen@nokia.com>
 Date:   Thu Dec 30 19:19:43 2010 +0200

    os: always check if client is local when connection is accepted

    LocalClient is used for all DRI2 requests that makes it frequently
    called function. Querying if connection is local or not takes 10-15us
    (on ARM) depending on malloc speed.
Signed-off-by: Pauli Nieminen <ext-pauli.nieminen@nokia.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>