A crash may happenin the cases when the range optimizer tried to OR
two index merge such that the second one contained less range trees
than the first one.
The bug was introduced by the patch of MWL#24: 
"index_merge: fair choice between index_merge union and range access".

Made range_vs_index_merge.test platform independent

independent execution plans.
Fixed a bug in Unique::unique_add that caused a crash for a query from
index_intersect_innodb on some platforms.
Fixed two bugs in opt_range.cc that led to the choice of not the
cheapest plans for index intersections.

The second (final) patch.

Made sure that rr_quick is used to read the next record whenever
a quick select is used to retrieve the table records.

Fixed a bug in the new code for WL#24 that caused generation of
an invalid index-merge access plan.

Fixed crashing bug when doing ALTER TABLE RENAME with transactional tables.

client/mysqltest.cc:
  Added errno to error message for system calls (delete, rename etc)
  Write error message for failures of system calls
mysql-test/include/cleanup_fake_relay_log.inc:
  Disable warnings for remove_file
mysql-test/include/diff_tables.inc:
  Disable warnings for remove_file
mysql-test/include/maria_empty_logs.inc:
  Disable warnings for remove_file
mysql-test/include/maria_make_snapshot.inc:
  Disable warnings for remove_file
mysql-test/include/maria_make_snapshot_for_feeding_recovery.inc:
  Disable warnings for remove_file
mysql-test/include/mysqlhotcopy.inc:
  Disable warnings for remove_file
mysql-test/include/ndb_backup.inc:
  Disable warnings for remove_file
mysql-test/include/ndb_backup_print.inc:
  Disable warnings for remove_file
mysql-test/r/alter_table_trans.result:
  Test of crashing ALTER TABLE RENAME bug
mysql-test/t/alter_table_trans.test:
  Test of crashing ALTER TABLE RENAME bug
mysql-test/t/mysqltest.test:
  Disable warnings for remove_file and move_file
mysys/my_copy.c:
  Fixed wrong error message
sql/sql_table.cc:
  Fixed crashing bug when doing ALTER TABLE RENAME with transactional tables.

libtool does not like it and fails the build.

This code is planned to be used for mwl#21.

- When reopening table during recovery, don't set file length from file sizes as file is not flushed.
New feature in Aria recovery:
- Create database directory if missing.



storage/maria/ma_recovery.c:
  Don't print Query: twice when running maria_read_log
  Create database directory if missing. (Needed when running maria_read_log on an empty database direcory during testing)
  More DBUG_print
  Fixed bug: When reopening table during recovery, don't set file length from file sizes as file is not flushed.

The problem could be demonstrated with an outer join of two single-row
tables where the values of the join attributes were null. Any query
with such a join could return a wrong result set if the where
condition of the query was not empty. For queries with empty
where conditions the result sets were correct.
This was the consequence of two bugs in the code:
 - Item_equal objects for on conditions of outer joins were
   not built if the processed query had no where condition
 - the check for null values in the code that evaluated constant 
   Item_equal objects was incorrect.
Fixed both above problems.
Added a test case for the bug and adjusted results for some other
test cases.

Fix for LP#634943 "marked as crashed", "zerofilling" and "wrong data in bitmap" when recovering Aria tables
This was an interaction of several bugs:
- Tables marked as opened was not properly unmarked on recovery if there was not changes since checkpoint
- zerofill of tables put wrong data in bitmap if directory for page was full
- Tables was thought as 'moved' during recovery if they had a create_lsn bigger than the lsn in the control file.


storage/maria/ha_maria.cc:
  If table is moved and crashed, threat it as crashed.
  (Not a related to this bug, but still good to have fixed)
storage/maria/ma_blockrec.c:
  Make enough_free_entries_on_page() global
storage/maria/ma_blockrec.h:
  Make enough_free_entries_on_page() global
storage/maria/ma_check.c:
  If directory is full, mark page full. Fixes bug in zerofill
storage/maria/ma_open.c:
  Don't marke files as MOVED during recovery if create_trid > trnman_max_trid, as this fails for tables created after checkpoint.
storage/maria/ma_recovery.c:
  Reset open_count in file that was open during crash and was part of checkpoint.
  Fixed wrong warning of 'open count' after recovery of files that was not touched since checkpoint.
storage/maria/maria_chk.c:
  Changed not documented option --log-dir to --logdir
  Document more of the options.
  Clean up output for --help
storage/maria/trnman.c:
  Added DBUG_PRINT

When not-exists optimization was applied to a table that
happened to be an inner table of two outer joins, one
embedded into another, then setting the match flag for
the embedding outer join on could be skipped. This caused
generation of extra null complemented rows.
Made sure that the match flags are set correctly in all cases
when not-exists optimization is used.  

Extend remove_function_from_trace.pl to work with many threads (patch from Sergei)


dbug/remove_function_from_trace.pl:
  Extend remove_function_from_trace.pl to work with many threads (patch from Sergei)
storage/maria/ma_bitmap.c:
  Added marker that table had changed since last checkpoint.
  This ensures that we will flush all bitmap pages from cache at checkpoint.
  This fixes bug LP#605798 "wrong data in bitmap" after recovery.
storage/maria/ma_check.c:
  Cleaned up error output
storage/maria/ma_recovery.c:
  Cleaned up error output
storage/maria/maria_def.h:
  Added changed_not_flushed

Don't give warning about block_insert if table is crashed.

scripts/mysql_install_db.sh:
  Added link to KB.
storage/maria/ma_recovery.c:
  Don't give warning about block_insert if table is crashed.

double compilation

Write message to stderr if recovery is not likely to succeed because we don't log records for batch inserts.
Don't do UNDO or REDO on a crashed table.
More DBUG_PRINT

sql/sql_parse.cc:
  Remove display of 'packet' which is not useful
storage/maria/ma_blockrec.c:
  More DBUG_PRINT()
storage/maria/ma_key_recover.c:
  Write page number instead of page position
storage/maria/ma_recovery.c:
  Write message to stderr if recovery is not likely to succeed because we don't log records for batch inserts.
  In normal cases this should never be an issue as we would recreate an empty table if MariaDB dies under batch insert.
  This warning will be given if you remove all tables and try to recreate them with maria_read_log, which can't be done as
  the log doesn't contain all data.
  Don't do UNDO or REDO on a crashed table.
storage/maria/ma_write.c:
  Write page number instead of page position.

Fixed typo that caused warnings from mysql-test-run

mysql-test/mysql-test-run.pl:
  Fixed typo
sql/mysqld.cc:
  Give a more precise warning why something fails.