Maxscale don't recognize logdir= in /etc/maxscale.cnf.d/maxscale.cnf

To reproduce

Create an empty file
/etc/maxscale.cnf

Create a file
/etc/maxscale.cnf.d/maxscale.cnf

with minimum
[MaxScale]
logdir=<wanted_path>

Maxscale use default logging Path (/var/log/maxscale)
instead <wanted_path> for logging.