after-merge fix for
  bug#15581 COALESCE function truncates mutli-byte TINYTEXT values

  After merge fix:
  fixing order of results.

into  mysql.com:/usr/home/bar/mysql-5.0

into  mysql.com:/usr/home/bar/mysql-4.1.b15581

into  mysql.com:/home/alik/MySQL/devel/5.0-bug15103

into  linux.site:/home/reggie/work/mysql-5.0

into  mysql.com:/opt/local/work/mysql-5.0-root

rename sha1_* to mysql_sha1_*

into  mysql.com:/usr/local/mysql/tmpbuild

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

Fix problem with strange printout of line numbers, detected on aix52, but existing on all platforms, just being masked by init of vars to zero.

into  mysql.com:/usr/local/mysql/mysql-5.0

into  mysql.com:/home/alik/MySQL/devel/5.0-bug15110

There are two main idea of this fix:
  - introduce a common function for server and client to split user value
    (<user name>@<host name>) into user name and host name parts;
  - dump DEFINER clause in correct format in mysqldump.

into  mysql.com:/nfstmp1/ingo/autopush-773/mysql-5.0

into  mysql.com:/home/mydev/mysql-5.0-bug5390

into  hasky.mysql.fi:/home/jani/mysql-5.0

into  mysql.com:/home/alexi/dev/mysql-5.0-15805

 To be uncommented after fixing bug 15805.

into  mysql.com:/home/mydev/mysql-5.0-bug5390

into  mysql.com:/usr_rh9/home/elkin.rh9/MySQL/mysql-5.0

There is a specific rpl_ignore_grant test case for GRANT.

into  neptunus.(none):/home/msvensson/mysql/wl2930/my50-wl2930-integration

into  rurik.mysql.com:/home/igor/dev/mysql-5.0-0

into  rurik.mysql.com:/home/igor/dev/mysql-4.1-0

into  neptunus.(none):/home/msvensson/mysql/wl2930/my50-wl2930-integration

into  neptunus.(none):/home/msvensson/mysql/bug15598/my50-bug15598

into  neptunus.(none):/home/msvensson/mysql/bug15598/my50-bug15598

- Comparing host string against NULL caused crash. 
- If host.hostname is NULL treat it as ""

into  neptunus.(none):/home/msvensson/mysql/yassl_link_problem/my50-yassl_link_problem