add 'count' to cumstomsummarypage 'calc'

README.RPC

@@ -1401,9 +1401,12 @@ You can only see fields listed in 'group' and 'calc'
 
 A 'calc' is formatted as: 'Field' => 'function'
 The current list of operations available for 'calc' are:
-'sum', 'avg', 'min', 'max', 'lo', 'hi', 'any'
+'sum', 'avg', 'min', 'max', 'lo', 'hi', 'coount', 'any'
 The first 4 are as expected - the numerical sum, average, minimum or maximum
 'lo' is the first string of the list, sorted ignoring case
 'hi' is the last string of the list, sorted ignoring case
+'count' is the number of rows in the section specified in the calc e.g.
+ ('DEVS.Name' => 'count') would be the number of DEVS selected in the 'where'
+ of course any valid 'DEVS.Xyz' would give the same 'count' value
 'any' is effectively random: the field value in the first row of the grouped data
 An unrecognised 'function' uses 'any'

miner.php

@@ -2109,6 +2109,8 @@ function docalc($func, $data)
 			if (strcasecmp($val, $ans) > 0)
 				$ans = $val;
 	return $ans;
+ case 'count':
+	return count($data);
  case 'any':
  default:
 	return $data[0];