This fixes problem where --replace_result failed in rpl000015 because the MYSQL_TCP_PORT variable was "3306\r"

The vardir trick can only bge used on platforms with native symlinks - otherwise opt_vardir need to be set to default value.

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

As both ndb and im are components that may be disabled as well as the binaries may not exist. Look for 
their binaries in a separate function and produce test casea failures for the test thet needs these components

into  mysql.com:/usr/home/ram/work/bug20732/my41-bug20732

into  mysql.com:/usr/home/ram/work/bug20732/my41-bug20732

This can not be done in run_testcase_start_servers as embedded never starts a server
Add error if mysqld_start is called in embedded mode 

into  polly.local:/home/kaa/src/maint/m41-maint--07OGk

into  polly.local:/home/kaa/src/maint/m41-maint--07OGk

- compilation on the Alpha platform was broken because the Alpha-specific code was not updated after replacing the SIGRETURN_FRAME_COUNT constant with a variable

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

Add function mtr_exe_maybe_exists to look for binaries that is optional
Skip ndb support if it's a binary dist where mysqld supports ndb but there is no ndbd

to a value wich is not our default

commands and go directly to result file processing

into  example.com:/work/bug23379/my41-bug23379

  
The value taken to be shown in SHOW PROCESSLIST is not
initialized when THD is created and will be random for
unauthenticated connections.
  
To the documentor: Random value, instead of NULL, was shown,
in SHOW PROCESSLIST for still non-authenticated connections.

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

into  example.com:/work/bug23379/my41-bug23379

We miss some records sometimes using RANGE method if we have
partial key segments.
Example:
  Create table t1(a char(2), key(a(1)));
  insert into t1 values ('a'), ('xx');
  select a from t1 where a > 'x';
We call index_read() passing 'x' key and HA_READ_AFTER_KEY flag
in the handler::read_range_first() wich is wrong because we have
a partial key segment for the field and might miss records like 'xx'.

Fix: don't use open segments in such a case.

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

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

into  example.com:/work/bug23379/my41-bug23379

The value taken to be shown in SHOW PROCESSLIST is not
initialized when THD is created and will be random for
unauthenticated connections.

To the documentor: Random value, instead of NULL, was shown,
in SHOW PROCESSLIST for still non-authenticated connections.

into thinking the escaped % + w was a format specifier

Improve code that detects if ndb shuold be installed
Remove call to stop_all_servers after install db, if any servers are still running 
and need to be stopped they will be stopped atuomatically

Set comment properly before calling mtr_report_test failed and report_failure_restart 

When calculating what features to use for _this_ test run, don't look at test that already are deterined to be skipped

into  siva.hindu.god:/usr/home/tim/m/bk/tmp/mrgOct16/41

Add verbose printouts making it possible to see what happens.
Make it an error if trying to stop a non existing timer
Print warning if fork fails.

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

mysqltest.test on Solaris and Mac. write_file produced nice files with all zeroes.