fixed resolve problems

Docs/manual.texi:
  fixed bad reference
sql/sql_lex.h:
  removed wrongly added backup_dir

Docs/manual.texi

@@ -17151,7 +17151,7 @@ Note that the table is locked during the time @code{OPTIMIZE TABLE} is
 running!
 
 @findex CHECK TABLE
-@node CHECK TABLE, ANALYZE TABLE, OPTIMIZE TABLE, Reference
+@node CHECK TABLE, BACKUP TABLE, OPTIMIZE TABLE, Reference
 @section @code{CHECK TABLE} syntax
 
 @example

sql/sql_lex.h

@@ -127,7 +127,6 @@ typedef struct st_lex {
   HA_CHECK_OPT   check_opt;			// check/repair options
   HA_CREATE_INFO create_info;
   LEX_MASTER_INFO mi;				// used by CHANGE MASTER
-  char* backup_dir;                             // used by RESTORE/BACKUP
   ulong thread_id,type;
   ulong options;
   enum_sql_command sql_command;