[Solr Wiki] Update of "FunctionQuery" by NoblePaul

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The following page has been changed by NoblePaul:
http://wiki.apache.org/solr/FunctionQuery

The comment on the change is:
marked the new feature in 'map' as a 1.4 feature

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  map(x,min,max,target) maps any values of the function x that fall within min and max inclusive to target.  min,max,target are constants. It outputs the field's value if it does not fall between min and max.
      Example Syntax 1: '''map(x,0,0,1)'''  change any values of 0 to 1... useful in handling default 0 values
  
-     Example Syntax 2: '''map(x,0,0,1,0)'''  change any values of 0 to 1 . and if the value is not zero it can be set to the value of the                     5th argument instead of defaulting to the field's value
+     Example Syntax 2 <!> ["Solr1.4"]: '''map(x,0,0,1,0)'''  change any values of 0 to 1 . and if the value is not zero it can be set to the value of the 5th argument instead of defaulting to the field's value