Add read_rnd_buffer_size in my.cnf example files

Remove wrong redefine of vio_reset() (to compile libmysqld on windows)

include/violite.h

@@ -55,14 +55,8 @@ int	vio_close_pipe(Vio * vio);
 
 void	vio_delete(Vio* vio);
 int	vio_close(Vio* vio);
-
-#ifdef EMBEDDED_LIBRARY
-void vio_reset(Vio *vio);
-#else
-void vio_reset(Vio* vio, enum enum_vio_type type,
-	       my_socket sd, HANDLE hPipe, my_bool localhost);
-#endif
-
+void    vio_reset(Vio* vio, enum enum_vio_type type,
+                  my_socket sd, HANDLE hPipe, my_bool localhost);
 int	vio_read(Vio *vio, gptr	buf, int size);
 int	vio_write(Vio *vio, const gptr buf, int size);
 int	vio_blocking(Vio *vio, my_bool onoff, my_bool *old_mode);

support-files/my-huge.cnf.sh

@@ -31,6 +31,7 @@ max_allowed_packet = 1M
 table_cache = 512
 sort_buffer_size = 2M
 read_buffer_size = 2M
+read_rnd_buffer_size = 8M
 myisam_sort_buffer_size = 64M
 thread_cache = 8
 query_cache_size = 32M

support-files/my-large.cnf.sh

@@ -31,6 +31,7 @@ max_allowed_packet = 1M
 table_cache = 256
 sort_buffer_size = 1M
 read_buffer_size = 1M
+read_rnd_buffer_size = 4M
 myisam_sort_buffer_size = 64M
 thread_cache = 8
 query_cache_size= 16M

support-files/my-medium.cnf.sh

@@ -32,6 +32,8 @@ max_allowed_packet = 1M
 table_cache = 64
 sort_buffer_size = 512K
 net_buffer_length = 8K
+read_buffer_size = 256K
+read_rnd_buffer_size = 512K
 myisam_sort_buffer_size = 8M
 
 # Don't listen on a TCP/IP port at all. This can be a security enhancement,

support-files/my-small.cnf.sh

@@ -31,6 +31,8 @@ key_buffer = 16K
 max_allowed_packet = 1M
 table_cache = 4
 sort_buffer_size = 64K
+read_buffer_size = 256K
+read_rnd_buffer_size = 256K
 net_buffer_length = 2K
 thread_stack = 64K