Merge with 4.1

BitKeeper/etc/logging_ok:
  auto-union
client/mysql.cc:
  Auto merged
extra/my_print_defaults.c:
  Auto merged
include/m_string.h:
  Auto merged
mysql-test/mysql-test-run.sh:
  Auto merged
mysql-test/r/ctype_utf8.result:
  Auto merged
mysql-test/r/user_var.result:
  Auto merged
mysql-test/t/user_var.test:
  Auto merged
scripts/make_binary_distribution.sh:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
strings/ctype-simple.c:
  Auto merged
strings/ctype-ucs2.c:
  Auto merged
strings/ctype-utf8.c:
  Auto merged
libmysql/libmysql.c:
  ul
mysql-test/r/ps_1general.result:
  Merge
mysql-test/t/derived.test:
  Merge
mysql-test/t/ps_1general.test:
  Merge
mysql-test/t/type_float.test:
  Merge
sql/field.cc:
  ul
sql/item.cc:
  ul
sql/item.h:
  ul
sql/item_func.h:
  ul
sql/item_strfunc.cc:
  ul
sql/item_sum.cc:
  ul
sql/item_sum.h:
  ul
sql/procedure.h:
  ul
sql/sql_derived.cc:
  Trivial merge
sql/sql_parse.cc:
  ul
sql/sql_update.cc:
  Trivial merge
strings/strtod.c:
  Use updated code from 4.1
  This is bascily same code as we had before or 5.0, execpt that we now have higher accuracy for floating points value that are integers (like 123.45E+02)

sql/sql_update.cc

@@ -707,7 +707,12 @@ bool mysql_multi_update_prepare(THD *thd)
     else
     {
       DBUG_PRINT("info",("setting table `%s` for read-only", tl->alias));
-      tl->lock_type= TL_READ;
+      /*
+        If we are using the binary log, we need TL_READ_NO_INSERT to get
+        correct order of statements. Otherwise, we use a TL_READ lock to
+        improve performance.
+      */
+      tl->lock_type= using_update_log ? TL_READ_NO_INSERT : TL_READ;
       tl->updating= 0;
     }