Fixed some windows portability problems and removed some compiler warnings
 Cleaned up QUOTE() function and fixed bug in \0 and \Z handling.


Docs/manual.texi:
  Changelog
  Added information about new IF() behaviour.
libmysql/libmysql.def:
  Removed mysql_ssl_clear
myisam/mi_dynrec.c:
  Minor cleanup
mysql-test/r/func_str.result:
  Added more tests for QUOTE
mysql-test/t/func_str.test:
  Added more tests for QUOTE
mysys/mf_iocache.c:
  Removed compiler warnings
sql/ha_innodb.cc:
  Added missing null to generated string.
sql/item_cmpfunc.cc:
  Changed IF(expr, column, NULL) to take type from column
sql/item_strfunc.cc:
  Cleaned up QUOTE() function and fixed bug in \0 and \Z handling.
sql/log.cc:
  Minor cleanup
sql/mysql_priv.h:
  Fixed problem with opt_enable_named_pipe
sql/mysqld.cc:
  Fixed problem with opt_enable_named_pipe
  Fixed some syntax errors in windows code
sql/set_var.cc:
  Removed compiler warnings
sql/slave.cc:
  Removed compiler warnings
sql/sql_show.cc:
  Removed compiler warnings