Backporting patch for Bug#52716 (Large files support is disabled,

large-pages option is broken) from next-mr to mysql-5.5.5-m3-release.

Original revision:
------------------------------------------------------------
revision-id: vvaintroub@mysql.com-20100416134524-y4v27j90p5xvblmy
parent: luis.soares@sun.com-20100416000700-n267ynu77visx31t
committer: Vladislav Vaintroub <vvaintroub@mysql.com>
branch nick: mysql-next-mr-bugfixing
timestamp: Fri 2010-04-16 15:45:24 +0200
message:
  Bug #52716 Large files support is disabled, large-pages option is broken.
  
  Correct typo: large pages option was tied to wrong variable opt_large_files,
  instead of opt_large_pages.
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sql/sys_vars.cc

@@ -875,7 +875,7 @@ static Sys_var_uint Sys_large_page_size(
 
 static Sys_var_mybool Sys_large_pages(
        "large_pages", "Enable support for large pages",
-       READ_ONLY GLOBAL_VAR(opt_large_files),
+       READ_ONLY GLOBAL_VAR(opt_large_pages),
        IF_WIN(NO_CMD_LINE, CMD_LINE(OPT_ARG)), DEFAULT(FALSE));
 
 static Sys_var_charptr Sys_language(