tracker issue : CF-3042151

Problem:

Make the "dependsOn" attribute of <cfcache> more flexible.The attribute "dependsOn" currently takes a list of variables, which lets the cache refresh in case one variable changed. Though this is often not the expected behavior. Sometimes you just want to update the cache, if a variable has a certain value.To do so "dependsOn" should also be able to take a structure of variables. See the steps to reproduce for an example how this could be implemented.
Method:

<cfparam name="URL.refresh" type="boolean" default="false">

<cfquery name="persons">  
SELECT firstName,lastName,dateOfBirth  FROM persons
</cfquery>

<!---  
Cache is always refreshed when URL.refresh is changing, but should just be refresh, if it is "true"  Therefore you should be able to specify a structure for "dependsOn" like {refresh=true}.  Maybe this logic could be enhanced to allow several values for one variable, but I believe most cases would already be covered with a simple structure.
--->

<cfcache name="test" dependsOn="refresh">
<cfoutput>  
<table>    
<tr>      
<th>First name</th>      
<th>Last name</th>      
<th>Date of birth</th>    
</tr>    
<cfloop query="persons">        
<tr>          
<td>#HTMLEditFormat(persons.sFirstName)#</td>          <td>#HTMLEditFormat(persons.sLastName)#</td>          <td>#dateFormat(persons.dBirthDate,"medium")#</td>        
</tr>    
</cfloop>  
</table>
</cfoutput>
</cfcache>
Result:

----------------------------- Additional Watson Details -----------------------------

Watson Bug ID:	3042151

External Customer Info:
External Company:  
External Customer Name: Sebastian Zartner
External Customer Email: 4E7365D64550DB12992015D5
External Test Config: 09/13/2010

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