Encode a string to the "x-www-form-urlencoded" form, enhanced with the UTF-8-in-URL proposal.

This is what happens:

• The ASCII characters 'a' through 'z', 'A' through 'Z', and '0' through '9' remain the same.
• The unreserved characters - _ . ! ~ * ' ( ) remain the same.
• The space character ' ' is converted into a plus sign '+'.
• All other ASCII characters are converted into the 3-character string "%xy", where xy is the two-digit hexadecimal representation of the character code.
• All non-ASCII characters are encoded in two steps: first to a sequence of 2 or 3 bytes, using the UTF-8 algorithm; secondly each of these bytes is encoded as "%xx".

Escape( x )

The encoded string.

Escape ("Peter Schmidt")   // Returns Peter+Schmidt
Escape ("Configuración")   // Returns Configuraci%c3%b3n
Escape ("Friedrichstraße 231, 10969 Berlin")   // Returns Friedrichstra%c3%9fe+231%2c+10969+Berlin

• Unescape function