update the doc

Signed-off-by: Gregory Romé <gregory.rome@gmail.com>
automatic login by using REMOTE_USER as uid

Signed-off-by: Gregory Romé <gregory.rome@gmail.com>
retrieve certificate information during callback

Signed-off-by: Gregory Romé <gregory.rome@gmail.com>
update the doc

Signed-off-by: Gregory Romé <gregory.rome@gmail.com>
Merge from develop branch