nvidia-settings: use proper escaping to fix hyphen-used-as-minus-sign lintian warning

Signed-off-by: Daniel Dadap <ddadap@nvidia.com>
nvidia-settings: fix permission of installed manpage

Signed-off-by: Daniel Dadap <ddadap@nvidia.com>
nvidia-settings: Do not fail if the driver doesn't support NV_CTRL_NO_SCANOUT

NV_CTRL_NO_SCANOUT is not supported by legacy drivers such as series
173 and 96. Pretending that the property exists and is set to false
prevents nvidia-settings from breaking compatibility with these drivers.

[ddadap@nvidia.com: altered patch to restore the warning message]

Signed-off-by:       Daniel Dadap <ddadap@nvidia.com>
nvidia-settings: fix -Werror=format-security errors

Signed-off-by: Sachin Chitte <schitte@nvidia.com>