Fix for Bug#3035 "Prepared statement integer inserts": now unsigned

flag is sent to server with placeholder types.
There were no need to extend the protocol as one additional byte
was reserved for placeholder code, when placeholder code is in range 0-255.
So this byte is now used for flags. Post-review fixes added.


include/config-win.h:
  added floaststore implementation
include/my_global.h:
  added floatstore implementation
include/mysql.h:
  Bug#3035:
  added 'is_unsigned' member
  binary_data wasn't used, removed
  null_field wasn't necessary, removed
include/mysql_com.h:
  Unused defines were removed.
libmysql/libmysql.c:
  Function store_param_type was removed - too much for a function, especially
  with bug in it.
  New implementation is inline and takes into account signedness of 
  placeholder.
  Fixed store functions to not perform double network-host order conversion
  on high-byte-first systems (should also fix Bug#3578 "Prepared statement 
  integer conversions work wrong in 64-bit Power Mac G5 CPUs").
  null_field removed.
sql/sql_prepare.cc:
  Placeholder sign is taken into account when reading data from network.
tests/client_test.c:
  Test for BUG#3035 added: insert and retrieve minimum and maximum of all
  integer types.

include/mysql.h

@@ -547,9 +547,8 @@ typedef struct st_mysql_bind
   unsigned long offset;           /* offset position for char/binary fetch */
   unsigned long	internal_length;  /* Used if length is 0 */
   unsigned int	param_number;	  /* For null count and error messages */
+  my_bool       is_unsigned;      /* set if integer type is unsigned */
   my_bool	long_data_used;	  /* If used with mysql_send_long_data */
-  my_bool       binary_data;      /* data buffer is binary */
-  my_bool       null_field;       /* NULL data cache flag */
   my_bool	internal_is_null; /* Used if is_null is 0 */
   void (*store_param_func)(NET *net, struct st_mysql_bind *param);
   void (*fetch_result)(struct st_mysql_bind *, unsigned char **row);