prepared statements in embedded library

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

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

to SHOW SLAVE STATUS.

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

bad merge fixed

bug#1269

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

Parse error caused global ORDER BY to be initialized although it should
not have been.

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

#977 Prepared statements in embedded library

Optimize calls to current_thd