Add DB_TYPE_AUTOASSIGN as a better name for DB_TYPE_UNKNOWN, which is what plugins should generally use.

The test for availability was done before detection (oops).

- The reason the test failed was competition between 3+ QEPs with identical
  costs. Before, two plans were competing, and that was addressed by using 
  --sorted_result on the EXPLAIN output because they were different only in 
  join order.
  Now we've got a 3rd plan which differs with "Using where" and that doesn't 
  work anymore.
- This patch fixes it by removing 'Using where' from EXPLAIN output. Test coverage
  is somewhat reduced but probably still ok as PBXT and nested outer join processing
  have no interaction and we don't expect any bugs here.

Also some small fixes to make the PBXT testsuite work in --embedded.

config/ac-macros/plugins.m4:
  MYSQL_PLUGIN_DEPENDS_ON_MYSQL_INTERNALS macro extended to support multiple files.
mysql-test/std_data/pbxt_load_unique_error1.inc:
  Move file to be accessible also for testing embedded server.
mysql-test/suite/pbxt/r/pbxt_bugs.result:
  Fix LOAD DATA LOCAL INFILE path so it works also for testing embedded server.
mysql-test/suite/pbxt/t/pbxt_bugs.test:
  Fix LOAD DATA LOCAL INFILE path so it works also for testing embedded server.
mysql-test/suite/pbxt/t/pbxt_locking.test:
  Disable for embedded, as it needs SHOW PROCESSLIST functionality not available there.
mysql-test/suite/pbxt/t/pbxt_transactions.test:
  Disable test for embedded, as it needs ability to connect from outside (mysqldump).
mysql-test/suite/pbxt/t/ps_1general.test:
  Fix replace_result for new mysql-test-run.pl.
sql/sql_plugin.cc:
  Remove hack that disables PBXT in embedded.
storage/pbxt/plug.in:
  Fix crash in PBXT in embedded server.
storage/pbxt/src/Makefile.am:
  Remove not needed CFLAGS/CXXFLAGS (they cause autotools to generate different object names, which in turn cause the MYSQL_PLUGIN_DEPENDS_ON_MYSQL_INTERNALS replacement of object files inside library files not to work).
storage/pbxt/src/ha_pbxt.cc:
  Ugly hack to allow more threads in embedded server (need a better fix I think).
storage/pbxt/src/table_xt.cc:
  Use stderr for logging not stdout (prevent spamming --embedded test suite output with stray messages).
storage/pbxt/src/thread_xt.cc:
  Use stderr for logging not stdout (prevent spamming --embedded test suite output with stray messages).
storage/pbxt/src/trace_xt.cc:
  Use stderr for logging not stdout (prevent spamming --embedded test suite output with stray messages).

Modified RN291: Fixed bug #489088, I use plugin_unlock to remove the reference from the THD, as it is not required

    Bug #494255
    Cannot run RQG due to errors in mysql-test-run.pl v1

Problem was missing variable declaration. Most likely due to a merge issue.

This solves a core dump in MariaDB when one sets the GLOBAL.DEBUG variable in mysql-test-run when other threads are checking the keyword list

dbug/dbug.c:
  Protect stack->keywords with THR_LOCK_dbug

Reviewer: knielsens


sql/slave.cc:
  For 4.0 server (with no time_zone variable), don't stop replication but give a warning

Fix bad merge causing error when specifying test case in non-default suite for mysql-test-run.
Implement the ability to add extra flags and configure options when running BUILD/xxx scripts.
Improve unclear help text in mysql-test-run

BUILD/FINISH.sh:
  Implement the ability to add extra flags and configure options when running BUILD/xxx scripts.
BUILD/SETUP.sh:
  Implement the ability to add extra flags and configure options when running BUILD/xxx scripts.
extra/yassl/taocrypt/include/block.hpp:
  Fix some compiler warnings.
mysql-test/lib/mtr_cases.pm:
  Fix bad merge causing error when specifying test case in non-default suite for mysql-test-run.
  Also remove some non-essential differences to mysql version to simplify future merges.
mysql-test/mysql-test-run.pl:
  Improve help texts.
plugin/fulltext/plugin_example.c:
  Fix some compiler warnings.
vio/viosslfactories.c:
  Fix some compiler warnings.

(-1 doesn't make sence as a row number and when doing insert / load data, first row is 1, so 0 is free to use)


mysql-test/r/warnings.result:
  Added test for warnings with row number
mysql-test/suite/funcs_1/r/innodb_func_view.result:
  Updated test results
mysql-test/suite/funcs_1/r/memory_func_view.result:
  Updated test results
mysql-test/suite/funcs_1/r/myisam_func_view.result:
  Updated test results
mysql-test/t/warnings.test:
  Added test for warnings with row numberAdded test for warnings with row number
sql/my_decimal.cc:
  Don't use -1 as row number
sql/share/errmsg.txt:
  Make row numbers unsigned

Fixed coredump in sql_plugin.cc:intern_plugin_lock() on mysqld start with PBXT


sql/mysqld.cc:
  Fixed coredump in sql_plugin.cc:intern_plugin_lock() on mysqld start with PBXT
sql/share/errmsg.txt:
  Row numbers are always positive
sql/sql_base.cc:
  Fixed race condition in lock tables when killing insert_delayed thread.
  This fixes Bug#47017 rpl_timezone fails on PB-2 with mismatch error
  (Note that the patch only adds a continue; The rest is (required) indentation changes)
sql/sql_class.cc:
  Fixed wrong output for high end machines in outfile_loaddata.
  (Problem was that ER_TRUNCATED_WRONG_VALUE_FOR_FIELD expects ulong, not ulonglong)
sql/sql_insert.cc:
  Ensure that if we get a lock problem with delayed_insert, the error is logged.

Ensure that mysql_get_server_version() also works if there is a non numerical prefix before the version number

Author: Alexander Barkov
License: GPL

mysql-test/t/ctype_ucs.test:
  Added test case for Croatina character set

Author: Antony Curtis
License: BSD


client/mysql.cc:
  Reset variable if CTRL-C was used to kill running query, so that the user can do it again
client/mysqlcheck.c:
  Indentation fix
client/mysqlslap.c:
  Indentation fixes
client/mysqltest.cc:
  Make testing of commands safer by also testing length
  Removed not used variable
  Fixed indentation to be as it was before last patch
mysql-test/lib/mtr_report.pm:
  Fixed typo
mysql-test/mysql-test-run.pl:
  Merge (Align code with default mysql-tes-run.pl)
mysql-test/suite/federated/disabled.def:
  Removed test case
storage/federatedx/ha_federatedx.cc:
  Removed my changes and applied Antony's instead

cmd-line-utils/readline/config_readline.h:
  Add back defines needed for linux to get rid of compiler warnings, but hide them for now until we have a solution for compile failure on MacOSX
strings/ctype-uca.c:
  Always define UCA contraction functions used by ctype-mb.c