allow default config file to be absent, honor command line arguments

clients/lcdproc/main.h

@@ -61,8 +61,6 @@ const char *get_hostname();
 const char *get_sysname();
 const char *get_sysrelease();
 
-extern char configfile[];
-
 #ifndef min
 # define min(a,b) (((a) < (b)) ? (a) : (b))
 #endif