- WL#3158: IM: Instance configuration extensions;
  - WL#3159: IM: --bootstrap and --start-default-instance modes

The following new statements have been added:
  - CREATE INSTANCE;
  - DROP INSTANCE;

The behaviour of the following statements have been changed:
  - SET;
  - UNSET;
  - FLUSH INSTANCES;
  - SHOW INSTANCES;
  - SHOW INSTANCE OPTIONS;


BitKeeper/deleted/.del-im_options_set.imtest~b53d9d60e5684833:
  Delete: mysql-test/t/im_options_set.imtest
BitKeeper/deleted/.del-im_options_set.result~59278f56be61d921:
  Delete: mysql-test/r/im_options_set.result
BitKeeper/deleted/.del-im_options_unset.imtest~768eb186b51d0048:
  Delete: mysql-test/t/im_options_unset.imtest
BitKeeper/deleted/.del-im_options_unset.result~20a4790cd3c70a4f:
  Delete: mysql-test/r/im_options_unset.result
client/get_password.c:
  Change prototype to avoid casting when using C-strings (char *).
include/m_string.h:
  Moved LEX_STRING to global header from sql/ to be accessible
  from all components (IM for one).
include/my_sys.h:
  Added constants for modify_defaults_file().
include/mysql_com.h:
  Removed duplicated declarations. my_sys.h should be used instead.
libmysql/get_password.c:
  Change prototype to avoid casting when using C-strings (char *).
mysql-test/mysql-test-run.pl:
  Added environment variables to be used from tests.
mysql-test/r/im_daemon_life_cycle.result:
  Column name has been changed in SHOW INSTANCES.
mysql-test/r/im_life_cycle.result:
  1. Column name has been changed in SHOW INSTANCES.
  2. Removed redundant SHOW INSTANCE STATUS statements.
mysql-test/r/im_utils.result:
  Updated the result file.
mysql-test/t/im_daemon_life_cycle-im.opt:
  Set minimal monitoring interval for Instance Manager to speed up testing.
mysql-test/t/im_daemon_life_cycle.imtest:
  Get Instance Manager and managed mysqld-instances enough time to start.
mysql-test/t/im_life_cycle.imtest:
  1. Polishing;
  2. Fixed a test error in 1.1.2.
mysql-test/t/im_utils.imtest:
  Get Instance Manager and managed mysqld-instances enough time to start.
mysys/default.c:
  Pass the name of the section to the handler function as well.
mysys/default_modify.c:
  Added REMOVE_SECTION functionality.
server-tools/instance-manager/IMService.cpp:
  Polishing: be more verbose.
server-tools/instance-manager/IMService.h:
  Polishing: added copyright.
server-tools/instance-manager/Makefile.am:
  Added new files.
server-tools/instance-manager/WindowsService.cpp:
  Polishing: according to The Coding Style, TRUE/FALSE must be
  used instead of true/false.
server-tools/instance-manager/WindowsService.h:
  Polishing: added copyright.
server-tools/instance-manager/command.h:
  Polishing: provide a comment for the main operation of "Command" class.
server-tools/instance-manager/commands.cc:
  1. Added support for CREATE INSTANCE, DROP INSTANCE statements;
  2. Added "deprecated" column in output of SHOW INSTANCE OPTIONS;
  3. Modified the behaviour of SET/UNSET, FLUSH INSTANCES statements;
server-tools/instance-manager/commands.h:
  1. Added support for CREATE INSTANCE, DROP INSTANCE statements;
  2. Added "deprecated" column in output of SHOW INSTANCE OPTIONS;
  3. Modified the behaviour of SET/UNSET, FLUSH INSTANCES statements;
server-tools/instance-manager/guardian.cc:
  Added operations to retrieve state of managed instances.
server-tools/instance-manager/guardian.h:
  Added operations to retrieve state of managed instances.
server-tools/instance-manager/instance.cc:
  1. Provided an operation to check validity of instance name.
  2. Added an attribute to distiguish mysqld-instances,
     whose configuration should be kept backward-compatible.
server-tools/instance-manager/instance.h:
  1. Provided an operation to check validity of instance name.
  2. Added an attribute to distiguish mysqld-instances,
     whose configuration should be kept backward-compatible.
server-tools/instance-manager/instance_map.cc:
  1. Used the operation to check validity of instance name;
  2. Added operations to manage instances.
server-tools/instance-manager/instance_map.h:
  Added operations to manage instances.
server-tools/instance-manager/instance_options.cc:
  Changed Instance_options so that it will be possible to manage
  options on the fly.
server-tools/instance-manager/instance_options.h:
  Changed Instance_options so that it will be possible to manage
  options on the fly.
server-tools/instance-manager/listener.cc:
  1. Remove reference to the instance of Options;
  2. Use new Options naming scheme.
server-tools/instance-manager/listener.h:
  Remove reference to the instance of Options;
server-tools/instance-manager/log.cc:
  Polishing: use TRUE/FALSE instead of true/false.
server-tools/instance-manager/manager.cc:
  Added a common for IM operation to work with configuration file.
server-tools/instance-manager/manager.h:
  Added a common for IM operation to work with configuration file.
server-tools/instance-manager/messages.cc:
  Added messages for new errors.
server-tools/instance-manager/mysql_connection.cc:
  1. Move a constant to common place.
  2. Polishing.
server-tools/instance-manager/mysql_manager_error.h:
  Added new errors.
server-tools/instance-manager/mysqlmanager.cc:
  1. Use error code from Options::load();
  2. Eliminate type-casting warning on Windows.
server-tools/instance-manager/options.cc:
  Added support for user-management command-line options.
server-tools/instance-manager/options.h:
  Added support for user-management command-line options.
server-tools/instance-manager/parse.cc:
  1. Added support of new statements:
     - CREATE INSTANCE;
     - DROP INSTANCE.
  2. Modified SET/UNSET.
server-tools/instance-manager/parse.h:
  1. Added support of new statements:
     - CREATE INSTANCE;
     - DROP INSTANCE.
  2. Modified SET/UNSET.
server-tools/instance-manager/parse_output.cc:
  Sorted out header files.
server-tools/instance-manager/parse_output.h:
  Sorted out header files.
server-tools/instance-manager/portability.h:
  1. Added constants for Windows.
  2. Moved system-dependent defines from instance_options.cc.
server-tools/instance-manager/priv.cc:
  Updated version.
server-tools/instance-manager/priv.h:
  Added some global constants.
server-tools/instance-manager/protocol.cc:
  Replaced NAME_WITH_LENGTH by LEX_STRING.
server-tools/instance-manager/protocol.h:
  Replaced NAME_WITH_LENGTH by LEX_STRING.
server-tools/instance-manager/thread_registry.cc:
  Polishing: use TRUE/FALSE instead of true/false.
server-tools/instance-manager/user_map.cc:
  Added support for managing password database.
server-tools/instance-manager/user_map.h:
  Added support for managing password database.
sql/sp.cc:
  Replaced LEX_STRING_WITH_INIT by LEX_STRING + struct initialization.
sql/sp_head.cc:
  Replaced LEX_STRING_WITH_INIT by LEX_STRING + struct initialization.
sql/spatial.cc:
  Removed LEX_STRING_WITH_INIT.
sql/spatial.h:
  Removed LEX_STRING_WITH_INIT.
sql/sql_string.h:
  Moved STRING_WITH_LEN() macro out from sql (to m_string.h).
sql/sql_trigger.cc:
  Moved STRING_WITH_LEN() macro out from sql (to m_string.h).
sql/structs.h:
  Removed LEX_STRING_WITH_INIT.
support-files/mysql.server.sh:
  Instruct Instance Manager to work in mysqld-safe compatible mode
  for backward compatibility.
mysql-test/r/im_cmd_line.result:
  Added result file.
mysql-test/r/im_instance_conf.result:
  Added result file.
mysql-test/r/im_options.result:
  Added result file.
mysql-test/t/im_cmd_line.imtest:
  IM command-line options test.
mysql-test/t/im_instance_conf-im.opt:
  Set minimal monitoring interval for Instance Manager to speed up testing.
mysql-test/t/im_instance_conf.imtest:
  Added a new test case for checking instance-management.
mysql-test/t/im_life_cycle-im.opt:
  Set minimal monitoring interval for Instance Manager to speed up testing.
mysql-test/t/im_options.imtest:
  Join im_options_set and im_options_unset and add new tests.
mysql-test/t/im_utils-im.opt:
  Set minimal monitoring interval for Instance Manager to speed up testing.
server-tools/instance-manager/exit_codes.h:
  New file for defining exit codes for user-management mode.
server-tools/instance-manager/user_management_commands.cc:
  User-management commands implementation.
server-tools/instance-manager/user_management_commands.h:
  User-management command declarations.