The mysql-test-run-shell.sh script was improperly evaluating an expression for setting up multiple masters.

This fix adds the `expr $MASTER_MYPORT + 1` construct to the offending line in order for the expression to evaluate properly and produce 9307 instead of the string "9306+1"  

MYSQL_VERSION_ID is tested before it has been defined.  This leads to
a warning when compiling with -Wundef and it also will break the
internal logic of mysql_com.h as soon as MYSQL_VERSION_ID exceeds
50000.

The fix entailed a simple re-ordering of included files in mysql.h

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

 - Add CR_CONN_HOST_ERROR to list of errorcode that trigger another connection
   attempt in mysqltest

into  example.com:/work/bug24395-v2/my41

into  kahlann.erinye.com:/home/df/mysql/build/mysql-4.1-build

into  dl145s.mysql.com:/data0/bk/team_tree_merge/MERGE/mysql-4.1-opt

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  bodhi.local:/opt/local/work/mysql-4.1-runtime

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

  Remove soft links before creating source TAR, to avoid file copies (bug#11865)

into  dl145s.mysql.com:/data0/bk/team_tree_merge/MERGE2/mysql-4.1-opt

into  dl145s.mysql.com:/data0/bk/team_tree_merge/MERGE2/mysql-4.1-opt

into  kahlann.erinye.com:/home/df/mysql/build/mysql-4.1-build-work

the problem is that client tools are compiled with UNDEF_THREADS_HACK
flag, and my thread-related additions to the mysqltest.c can't be compiled.
Easy solution is to disable these in not-embedded case completely.

into  bodhi.local:/opt/local/work/mysql-4.1-runtime

where we know how to creat the vardir 
Remove unused variable

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

 - Avoid use of mtr_run when executing "mysqld --verbose --help" to find
   version and supported features

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

in all cuurently known log files 

After that it will by default use log tables. That setting can be overruled
by adding a -master.opt file like mysql_client_test has.

ALTER TABLE DISABLE KEYS doesn't work when modifying the table
  
ENABLE|DISABLE KEYS combined with another ALTER TABLE option, different
than RENAME TO did nothing. Also, if the table had disabled keys
and was ALTER-ed then the end table was with enabled keys.
  
Fixed by checking whether the table had disabled keys and enabling them
in the copied table.

  If using \$(srcdir)/mysql.info in action, use same in rule.

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint