[doc] lighttpd.conf: lighttpd choose event-handler

comment out server.event-handler in sample lighttpd.conf
so that lighttpd chooses the recommended event-handler
for each OS

doc/config/lighttpd.conf

@@ -176,15 +176,16 @@ include "conf.d/debug.conf"
 ##
 ## set the event-handler (read the performance section in the manual)
 ##
-## possible options on linux are:
+## The recommended server.event-handler is chosen for each OS, if available.
 ##
-## select
-## poll
-## linux-sysepoll
+## epoll  (recommended on Linux)
+## kqueue (recommended on *BSD and MacOS X)
+## solaris-devpoll (recommended on Solaris)
+## poll   (recommended if none of above are available)
+## select (not recommended)
+## libev  (not recommended)
 ##
-## linux-sysepoll is recommended on kernel 2.6.
-##
-server.event-handler = "linux-sysepoll"
+#server.event-handler = "linux-sysepoll"
 
 ##
 ## The basic network interface for all platforms at the syscalls read()