ocserv: don't use isolate workers as seccomp is not enabled

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

net/ocserv/files/ocserv.conf.template

 # A banner to be displayed on clients
 banner = "Welcome to OpenWRT"
 
-isolate-workers = true
+#isolate-workers = true
 
 # When the server has a dynamic DNS address (that may change),
 # should set that to true to ask the client to resolve again on