Fixed problems on systems using newer GLIB and GCC (2.96) which no

longer allow the -Wp,-lang-c-c++-comments directive.  Also cleaned
up getloadavg support that had problems on Solaris and RedHat 7.1.
Removed unused variables in a number of functions as a result of
warnings when compiled with --enable-debug config option.

server/drivers/glkproto.h

@@ -57,6 +57,6 @@ int glkgetc( GLKDisplay * fd );
 int glkpoll( GLKDisplay * fd, int timeout );
 int glkflow( GLKDisplay * fd, int full, int empty );
 
-static int glkunget( GLKDisplay * fd, int c );
+int glkunget( GLKDisplay * fd, int c );
 
 #endif