Comment fixed.

Support of virtual columns added to maria engine.

mysql-test/suite/vcol/r/vcol_handler_maria.result:
  Basic tests for virtual column and maria engine.
mysql-test/suite/vcol/t/vcol_handler_maria.test:
  Basic tests for virtual column and maria engine.
storage/maria/ha_maria.cc:
  Support of virtual columns added to maria engine.
storage/maria/ha_maria.h:
  Support of virtual columns added to maria engine.

The CREATE SHOW TABLE command misplaced virtual column specifiers:
the AS clause for a virtual column was put before optional
character set attributes, not after them as required by the syntax. 

mysql-test/suite/funcs_1/r/is_columns_is.result:
  update for monty changes
mysql-test/valgrind.supp:
  more generic suppression for dlerror() internal allocations
scripts/make_win_bin_dist:
  update for hakan changes - we don't generate .map files anymore
sql/CMakeLists.txt:
  innodb_plugin is said to need .map files in sql/

mysys/mf_keycache.c:
  warning on windows
storage/example/ha_example.cc:
  fighting the warnings don't ifdef too much.
  a function must return a value!
storage/xtradb/Makefile.am:
  add -lmysqlservices for ha_xtradb.so plugin to load

Due to an invalid check for NULL of the second argument of the 
Item_func_round items performed in the code of Item_func_round::real_op
the function ROUND  sometimes could return wrong results.

Fix based on code from Stewart Smith

storage/archive/ha_archive.cc:
  Ensure that the frm definition is stored in optimized tables.

The command CREATE TABLE AS SELECT erroneously preserved the virtual
properties of the virtual fields from the select list. 

For queries with order by clauses that employed filesort usage of
virtual column references in select lists could trigger assertion
failures. It happened because a wrong vcol_set bitmap was used for
filesort. It turned out that filesort required its own vcol_set bitmap.

Made management of the vcol_set bitmaps similar to the management
of the read_set and write_set bitmaps.  

mysql-test/valgrind.supp:
  Added suppression for memory leak in dlsym() on work-amd64
plugin/auth/auth_socket.c:
  Fixed compiler warning (wrong macro usage)
storage/example/ha_example.cc:
  Fixed compiler warnings
storage/sphinx/ha_sphinx.cc:
  Fixed compiler warnings

Fixes LP#583314 user_statistics - INT overflow

mysql-test/r/status_user.result:
  Update test results
sql/sql_show.cc:
  Changed usage statistics to use 64 bit ints instead of 32 for all relevant variables.

If the expression for a virtual column of table contained datetime
comparison then the execution of the second query that used this
virtual column caused a crash. It happened because the execution
of the first query that used this virtual column inserted a cached
item into the expression tree. The cached tree was allocated in
the statement memory while the expression tree was allocated in
the table memory.
Now the cached items that are inserted into expressions for virtual
columns with datetime comparisons are always allocated in the same
mem_root as the expressions for virtual columns. So now the inserted
cached items are valid for any queries that use these virtual columns. 

The issue was that we didn't always check result of ha_rnd_init() which caused a problem for handlers that returned an error in this code.
- Changed prototype of ha_rnd_init() to ensure that we get a compile warning if result is not checked.
- Added ha_rnd_init_with_error() that prints error on failure.
- Checked all usage of ha_rnd_init() and ensure we generate an error message on failures.
- Changed init_read_record() to return 1 on failure.




sql/create_options.cc:
  Fixed wrong printf
sql/event_db_repository.cc:
  Check result from init_read_record()
sql/events.cc:
  Check result from init_read_record()
sql/filesort.cc:
  Check result from ha_rnd_init()
sql/ha_partition.cc:
  Check result from ha_rnd_init()
sql/ha_partition.h:
  Fixed compiler warning
sql/handler.cc:
  Added ha_rnd_init_with_error()
  Check result from ha_rnd_init()
sql/handler.h:
  Added ha_rnd_init_with_error()
  Changed prototype of ha_rnd_init() to ensure that we get a compile warning if result is not checked
sql/item_subselect.cc:
  Check result from ha_rnd_init()
sql/log.cc:
  Check result from ha_rnd_init()
sql/log_event.cc:
  Check result from ha_rnd_init()
sql/log_event_old.cc:
  Check result from ha_rnd_init()
sql/mysql_priv.h:
  init_read_record() now returns error code on failure
sql/opt_range.cc:
  Check result from ha_rnd_init()
sql/records.cc:
  init_read_record() now returns error code on failure
  Check result from ha_rnd_init()
sql/sql_acl.cc:
  Check result from init_read_record()
sql/sql_cursor.cc:
  Print error if ha_rnd_init() fails
sql/sql_delete.cc:
  Check result from init_read_record()
sql/sql_help.cc:
  Check result from init_read_record()
sql/sql_plugin.cc:
  Check result from init_read_record()
sql/sql_select.cc:
  Check result from ha_rnd_init()
  Print error if ha_rnd_init() fails.
sql/sql_servers.cc:
  Check result from init_read_record()
sql/sql_table.cc:
  Check result from init_read_record()
sql/sql_udf.cc:
  Check result from init_read_record()
sql/sql_update.cc:
  Check result from init_read_record()
storage/example/ha_example.cc:
  Don't return error on rnd_init()
storage/ibmdb2i/ha_ibmdb2i.cc:
  Removed not relevant comment

mysql-test/suite/federated/federated_server.result:
  Update to new error message
mysql-test/suite/federated/federated_server.test:
  Update to new error message
storage/federatedx/ha_federatedx.cc:
  Return real error code, not 0, as in some cases before.

mysql client: Ignore --comments at start of command line. This allows one to more easily run mysqltest tests trough the command line.
Fixed bug: LP#603026 RQG: pagecache_read: Assertion `pageno < ((1ULL) << 40)' on OPTIMIZE TABLE of a Maria table  

client/mysql.cc:
  Removed Oracle copyright from stdout, as Oracle doesn't have copyright to all code in this file.
  Ignore --comments at start of command line. This allows one to more easily run mysqltest tests trough the command line.
mysql-test/suite/maria/r/optimize.result:
  Added test for LP#603026
mysql-test/suite/maria/t/optimize.test:
  Added test for LP#603026
sql/net_serv.cc:
  Removed DBUG_ASSERT(), as this code can happen during testing.
storage/maria/ma_check.c:
  Fixed bug: LP#603026 RQG: pagecache_read: Assertion `pageno < ((1ULL) << 40)' on OPTIMIZE TABLE of a Maria table  
  The problem was duplicated memory usage with long packed keys.

There were two problems that caused wrong results reported with this bug.
1. In some cases stored(persistent) virtual columns were not marked
in the write_set and in the vcol_set bitmaps.
2. If the list of fields in an insert command was empty then the values of
the stored virtual columns were set to default.

To fix the first problem the function st_table::mark_virtual_columns_for_write
was modified. Now the function has a parameter that says whether the virtual 
columns are to be marked for insert or for update.  
To fix the second problem a special handling of empty insert lists is
added in the function fill_record().

If a virtual column was used in the ORDER BY clause of a query
and some of the columns this virtual column was based upon were
not referenced anywhere in the query then the execution of the
query could cause an assertion failure.
It happened because in this case the bitmap of the columns used
for ordering keys was not formed correctly.

There was no error thrown when creating a table with a virtual table
computed by an expression returning a row.
This caused a crash when inserting into the table.

Removed periods at the end of the error messages for virtual columns.
Adjusted output in test result files accordingly. 

The functions mysql_delete and mysql_update lacked calls of
updated_virtual_fields(). This caused wrong results for
some DELETEs/UPDATEs.
Added test cases for this bug.

redone locking in TC_LOG_MMAP::log_xid