nginx.conf: Make use of the "auto" directive to let nginx spawn as many workers as there are CPU cores

nginx/nginx.conf

@@ -1,14 +1,14 @@
 # Set another default user than root for security reasons
 user www www;
 
-# As a thumb rule: One per CPU. If you are serving a large amount
-# of static files, which requires blocking disk reads, you may want
-# to increase this from the number of cpu_cores available on your
-# system.
+# How many worker threads to run; "auto" sets it to the number
+# of CPU cores available in the system, and offers the best
+# performance. Don't set it higher than the number of CPU cores
+# if changing this parameter.
 #
 # The maximum number of connections for Nginx is calculated by:
 # max_clients = worker_processes * worker_connections
-worker_processes 1;
+worker_processes auto;
 
 # Maximum file descriptors that can be opened per process
 # This should be > worker_connections