lib: Refresh nginx/uwsgi configuration

lib: Refresh nginx/uwsgi configuration

As stated in http://uwsgi-docs.readthedocs.io/en/latest/Nginx.html:
"
Unfortunately nginx is not able to rewrite PATH_INFO accordingly to
SCRIPT_NAME. For such reason you need to instruct uWSGI to map specific
apps in the so called “mountpoint” and rewrite SCRIPT_NAME and PATH_INFO
automatically
[...]
ancient uWSGI versions used to support the so called “uwsgi_modifier1 30”
approach. Do not do it. it is a really ugly hack
"

Replacing the uwsgi_modifier1 hack by a mount point seems to work.

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>