In commit 104f90f4ce ('gssd: Introduce use-gss-proxy boolean to nfs.conf'),
use-gss-proxy par in [gssd] section of nfs.conf is introduced to
allow the used of the gssprox-mech. However, the default value
of use-gss-proxy is false, which cause different behavor with older
version.
In order to be consistent with the old versions, here we set
use-gss-proxy to true in nfs.conf.
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>