path{string|Buffer|URL}options{string|Object}encoding{string} Default:'utf8'
Synchronous readlink(2). Returns the symbolic link's string value.
The optional options argument can be a string specifying an encoding, or an
object with an encoding property specifying the character encoding to use for
the link path passed to the callback. If the encoding is set to 'buffer',
the link path returned will be passed as a Buffer object.