doc/example-config: Rename service_count

doc/example-config/conf.d/20-managesieve.conf

@@ -17,14 +17,15 @@
   #}
 
   # Number of connections to handle before starting a new process. Typically
-  # the only useful values are 0 (unlimited) or 1. 1 is more secure, but 0
-  # is faster. https://doc.dovecot.org/admin_manual/login_processes/
-  #service_count = 1
+  # the only useful values are "unlimited" or 1. 1 is more secure, but
+  # "unlimited" is faster.
+  # https://doc.dovecot.org/admin_manual/login_processes/
+  #restart_request_count = 1
 
   # Number of processes to always keep waiting for more connections.
   #process_min_avail = 0
 
-  # If you set service_count=0, you probably need to grow this.
+  # If you set restart_request_count=unlimited, you probably need to grow this.
   #vsz_limit = 64M
 #}