unescapeString
Unescapes a whole escaped string.
If any of the characters in @illegal_characters or the NUL character appears as an escaped character in @escaped_string, then that is an error and null will be returned. This is useful if you want to avoid for instance having a slash being expanded in an escaped path element, which might confuse pathname handling.
Return
an unescaped version of @escaped_string. The returned string should be freed when no longer needed.
Since
2.16
Parameters
escapedString
an escaped string to be unescaped.
illegalCharacters
a string of illegal characters not to be allowed, or null.