Allow for configuration of the maximum number of indexes per table.
Added and used a configure.in macro.
Replaced fixed limits by the configurable limit.
Limited MyISAM indexes to its hard limit.
Fixed a bug in opt_range.cc for many indexes with InnoDB.

Tested for 2, 63, 64, 65, 127, 128, 129, 255, 256, and 257 indexes.
Testing this part of the bugfix requires rebuilding of the server 
with different options. This cannot be done with our test suite. 
Therefore I added the necessary test files to the bug report.
If you repeat the tests, please note that the ps_* tests fail for
everything but 64 indexes. This is because of differences in the 
meta data, namely field lengths for index names etc.

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

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

Removed warnings that depends on floating point comparisions in type_newdecimal.test which caused failures in some setups
[Backported from mysql-5.1-new @1.1961.1.1]

into mysql.com:/home/hf/work/mysql-5.0.14693

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

into  mysql.com:/usr/home/bar/mysql-4.1.b10446

into  mysql.com:/home/jimw/my/mysql-5.0-clean

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

into  mysql.com:/home/jimw/my/mysql-5.0-clean

into  mysql.com:/home/jimw/my/mysql-5.0-clean

into  mysql.com:/home/jimw/my/mysql-5.0-clean

into  devsrv-b.mysql.com:/space/magnus/mysql-5.0

into  mysql.com:/usr/local/mysql/mysql-4.1

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

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

into  mysql.com:/usr/home/pem/bug14643/mysql-5.0

into  mysql.com:/usr/home/bar/mysql-4.1.b14406

  After merge fix.

into  mysql.com:/usr/home/pem/bug14643/mysql-5.0

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

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

into  mysql.com:/usr/home/bar/mysql-4.1.b14406

into mysql.com:/Users/kent/mysql/bk/mysql-4.1

  Fixing Item_param::safe_charset_converter to do less "new"s.

into serg.mylan:/usr/home/serg/Abk/mysql-5.0

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

into serg.mylan:/usr/home/serg/Abk/mysql-5.0

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

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

into serg.mylan:/usr/home/serg/Abk/mysql-5.0

earlier because of various features/checks missing (these features/checks
are now implemented).

into serg.mylan:/usr/home/serg/Abk/mysql-5.0

A typo bug caused loss of a predicate of the form field=const in some cases.