roles/aurweb: Add the missing pieces to make smartgit work with uwsgi

Added the uwsgi_modifier1 option to nginx as described on [0] and also
change the chmod option on the socket to allow nginx to connect to it.

[0] https://gist.github.com/janoliver/85b682227bd9fcb8942885e60208bd76

roles/aurweb/templates/nginx.d.conf.j2

@@ -47,6 +47,7 @@ server {
     location ~ "^/([a-z0-9][a-z0-9.+_-]*?)(\.git)?/(git-(receive|upload)-pack|HEAD|info/refs|objects/(info/(http-)?alternates|packs)|[0-9a-f]{2}/[0-9a-f]{38}|pack/pack-[0-9a-f]{40}\.(pack|idx))$" {
         include      uwsgi_params;
         uwsgi_pass   smartgit;
+        uwsgi_modifier1 9;
         uwsgi_param  SCRIPT_FILENAME /usr/lib/git-core/git-http-backend;
         uwsgi_param  PATH_INFO /aur.git/$3;
         uwsgi_param  GIT_HTTP_EXPORT_ALL "";

roles/aurweb/templates/smartgit.ini.j2

@@ -2,6 +2,7 @@
 plugins = cgi
 socket = {{ smartgit_socket }}
 chown-socket = {{ aurweb_user }}:http
+chmod-socket = 770
 threads = 4
 cgi = /usr/lib/git-core/git-http-backend
 uid = {{ aurweb_user }}