Wishlist: Have charlists to filter in CleanFilenames Task as option in INI file.

[pjotrek-b]

Currently, the characters replaced by CleanFilenames are hardcoded in the source code.
It would be great to have the option which-chars-to-replace(by-what) in the config file, and not the code 😊

[pjotrek-b]

For use in the INI option "CLEAN_SOURCE[]", the following pre-defined, hardcoded replacement lists are available:

'illegal' => self::$CHARS_ILLEGAL,
'whitespace' => self::$CHARS_WHITESPACE,
'slashes' => self::$CHARS_SLASHES,
'umlauts' => self::$CHARS_UMLAUTS,
'brackets' => self::$CHARS_BRACKETS,
'quotation' => self::$CHARS_QUOTATION,
'quotation2' => self::$CHARS_QUOTATION2,
'picky' => self::$CHARS_PICKY,

public static $CHARS_UMLAUTS = array(
      "ä" => "ae",
      "ü" => "ue",
      "ö" => "oe",
      "ß" => "ss",

      "Ä" => "AE",
      "Ü" => "UE",
      "Ö" => "OE",
      );

public static $CHARS_ILLEGAL = array(
      "?" => "_",
      "*" => "_",
      ":" => "_",
      );

public static $CHARS_WHITESPACE = array(
      " " => "_",
      );

public static $CHARS_SLASHES = array(
      "\\" => "_",
      "/" => "_",
      );

public static $CHARS_BRACKETS = array(
      "(" => "_",
      ")" => "_",
      "[" => "_",
      "]" => "_",
      "{" => "_",
      "}" => "_",
      "<" => "_",
      ">" => "_",
      );

// Quotation marks and ticks
// Replace them with "less critical" ones.
public static $CHARS_QUOTATION = array(
      "„" => "\"",
      "“" => "\"",
      "´" => "'",
      "`" => "'",
      );

// Quotation marks and ticks 2:
// Remove them completely.
public static $CHARS_QUOTATION2 = array(
      "„" => "_",
      "“" => "_",
      "´" => "_",
      "`" => "_",
      '"' => "_",
      "'" => "_",
      );

// Even more optional (being picky!):
public static $CHARS_PICKY = array(
      "#" => "_",
      "," => "_",
      ";" => "_",
      "&" => "and",
      );