Header fixes:

* Do not include system headers in shared files (stdlib.h).
* Don't include lcd.h only once in each driver.
* Remove some unnecessary headers from driver (e.g. syslog.h)
* Include <poll.h> instead of <sys/poll.h>
* Spelling fixes.

server/drivers/CwLnx.h

@@ -22,13 +22,6 @@
 #ifndef CWLNX_H
 #define CWLNX_H
 
-#include "lcd.h"
-
-// #define DEFAULT_CONTRAST 560
-// #define DEFAULT_BRIGHTNESS 60
-// #define DEFAULT_OFFBRIGHTNESS 0
-// #define DEFAULT_EXITBRIGHTNESS 0
-
 #define DEFAULT_DEVICE		"/dev/lcd"
 #define DEFAULT_BACKLIGHT	1
 #define DEFAULT_BRIGHTNESS	700