C++ library that implements "URL"

 C++ library which provides containers and algorithms which model a "URL,"
 the Uniform Resource Identifier (URI) specification (henceforth referred to
 as rfc3986).
 .
 A URL is a compact sequence of characters that identifies an abstract or
 physical resource.
 .
 This library understands the grammars related to URLs and provides
 functionality to validate, parse, examine, and modify urls, and apply
 normalization or resolution algorithms.