add 'mail' attribute to escape modifier

NEWS

@@ -1,3 +1,6 @@
+  - add 'mail' to escape modifier for safe display of e-mail
+    addresses (Monte)
+  - add cycle function attribute "reset" to english docs (Monte)
   - enhanced support of numeric constants as variable-expressions (messju)
   - add case decentity to smarty_modifier_escape() (Konstantin A. Pelepelin,
     messju)

libs/plugins/modifier.escape.php

@@ -59,6 +59,10 @@ function smarty_modifier_escape($string, $esc_type = 'html')
         case 'javascript':
             // escape quotes and backslashes and newlines
             return strtr($string, array('\\'=>'\\\\',"'"=>"\\'",'"'=>'\\"',"\r"=>'\\r',"\n"=>'\\n'));
+            
+        case 'mail':
+            // safe way to display e-mail address on a web page
+            return str_replace(array('@', '.'),array(' [AT] ', ' [DOT] '),$string);
 
         default:
             return $string;