Description:
------------
*** apc.php ***

'SEARCH' => '~^[a-zA-Z0-1/_.-]*$~' // aggregation by dir level

//should be:

'SEARCH' => '~^[a-zA-Z0-9/_.-]*$~' // aggregation by dir level



Test script:
---------------
1.) Create two user cache entries with keys "foo_1_bar" and "foo_2_bar"
2.) Open apc.php and got to "User Cache Entries"
3.) Use the "Search" to find "foo_1" (Result: Success)
4.) Use the "Search" to find "foo_2" (Result: Fail)

Expected result:
----------------
The "Search" functionality in apc.php of user cache entries should find keys with any number 0-9

Actual result:
--------------
The "Search" functionality in apc.php of user cache entries will break if numbers >=2 are used (ie. 2-9)