prepared statements in embedded library.
some fixes after testing

embedded library
some dirty places cleaned:

uint removed from mysql.h as Miguel suggested
empty_string renamed as my_empty_string to get rid of name's intersections
using embedded library

embedded library
I decided to get rid of #define mysql_some_function in mysql.h
It puzzles users and makes problems with dynamic libraries

Finally, there are only two functions left, that are covered with
the #define-s and it won't hurt performance at all

into sanja.is.com.ua:/home/bell/mysql/bk/work-union-4.1

  Fix the problem with errmsg compilation

into sanja.is.com.ua:/home/bell/mysql/bk/work-union-4.1

prepared statements in embedded library

into deer.(none):/home/hf/work/mysql-4.1.stmt

prepared statements in embedded library

into sanja.is.com.ua:/home/bell/mysql/bk/work-union-4.1

into deer.(none):/home/hf/work/mysql-4.1.stmt

prepared statements in embedded library

into deer.(none):/home/hf/work/mysql-4.1.stmt

  SET character_set_connection=newcharset;
  SELECT hex('text');

The above sequence failed in some cases.

into deer.(none):/home/hf/work/mysql-4.1.stmt

into deer.(none):/home/hf/work/mysql-4.1.stmt

Prepared statements in embedded server
Several changes in library code with two goals:
to make mysql_prepare_stmt working in embedded server
to get rid of #define mysql_interface_func mysql->methods->interface_func
in user's interface

http://bugs.mysql.com/bug.php?id=1264

http://bugs.mysql.com/bug.php?id=1264

http://bugs.mysql.com/bug.php?id=1129
From:	Georg Richter
Description: there is a problem with special chars like umlauts in comments 

into mysql.com:/home/dlenev/src/mysql-4.1-clean

into bar.mysql.r18.ru:/usr/home/bar/mysql-4.1

into mysql.com:/home/mysql_src/mysql-4.1

into bar.mysql.r18.ru:/usr/home/bar/mysql-4.1

10 now means "number of characters", not number of bytes.

into sanja.is.com.ua:/home/bell/mysql/bk/work-qc-4.1

into mysql.com:/home/mysql_src/mysql-4.1

  I forgot to push it in the previous changeset.

into sanja.is.com.ua:/home/bell/mysql/bk/work-qc-4.1

CREATE TABLE t1(a NVARCHAR(10))
This is for compatibility with MSSQL, DB2, Informix and some other DBMSs.

Note, standard SQL doesn't have "NVARCHAR" syntax.
There are only these syntaxes in SQL2003:
 NATIONAL VARCHAR
 NCHAR VARCHAR
 NATIONAL CHARACTER VARYING 
 NCHAR VARYING

- Tests were added for all the above syntaxes.

into mysql.com:/home/dlenev/src/mysql-4.1-868