State of MERGE between MariaDB 5.5 and MySQL 5.6.5-m8

Featured copied/merged
- storage/innodb/*
- storage/perfschema
- sql/share/errmsg-utf8.txt
- mysqltest/suite/perfschema
- All CF_XXX states in sql_class.h.
- handler error messages.
- Removed timestamp handling from all handler::write and handler::update
  methods.
- Added PSI_CALLS to handler.cc
- Added thd->m_statement_psi
- Added variables Sys_ssl_crl & Sys_ssl_crlpath
  (Including support in all clients)
- Added Ssl_server_not_before & Ssl_server_not_after variables
  (Including changes to yassl)
- Added all mysql systems tables
- TRANSACTION READ ONLY | READ WRITE

Features recoded
- Better error messages
- Added support of timestamps to ha_write and ha_update.

Fetures half done:
- Support for TRANSACTION READ ONLY | READ WRITE
- CF_XXX states added to init_update_queries() but not otherwise used.
- Merge sql/rpl_mi.cc (To get Sys_ssl_crl & crlpath)

Short time TODO:
- Add test cases for InnoDB

- merge hostname.cc / hostname.h
- add support for host_error()
- Enable performance_schema.host_cache in scripts/mysql_system_tables.sql

- Add full support for automatic timestamp.
 (remove timestamp handling from ha_write())
  - Timour is working on this

- Add Sys_my_bind_addr(); Needed for perfschema

- Add THD_STAGE_INFO everywhere.

- mysql_socket_shutdown() was removed from vio/viosocket.cc.
  It was replaced with inline function in include/mysql/psi/mysql_socket.h
  but this doesn't call DisconnectEx(). We should check if we need to
  add this to the inline function...