Don't limit number of tables in table cache

sql/mysqld.cc

@@ -4067,7 +4067,7 @@ this value; if zero (the default): when the size exceeds max_binlog_size. \
    1, 0},
   {"table_cache", OPT_TABLE_CACHE,
    "The number of open tables for all threads.", (gptr*) &table_cache_size,
-   (gptr*) &table_cache_size, 0, GET_ULONG, REQUIRED_ARG, 64, 1, 16384, 0, 1,
+   (gptr*) &table_cache_size, 0, GET_ULONG, REQUIRED_ARG, 64, 1, ~0L, 0, 1,
    0},
   {"thread_concurrency", OPT_THREAD_CONCURRENCY,
    "Permits the application to give the threads system a hint for the desired number of threads that should be run at the same time.",