make URL.port unsigned, to match Webclient's interface.

url_parser.cc

@@ -13,7 +13,7 @@ BOOST_FUSION_ADAPT_STRUCT(
     (std::string, username)
     (std::string, password)
     (std::string, host)
-    (int        , port)
+    (unsigned   , port)
     (std::string, path_and_query)
     (std::string, fragment)
 )
@@ -41,7 +41,7 @@ struct UriGrammar : qi::grammar<Iterator, URL()>
                         >> -(':' >> password) >> '@'
                       )
             >> host
-            >> (':' >> qi::int_[ boost::phoenix::at_c<4>(qi::_val) = qi::_1 ])
+            >> (':' >> qi::uint_[ boost::phoenix::at_c<4>(qi::_val) = qi::_1 ])
             >> -(path_and_query) // >> -('?' >> params[ boost::phoenix::at_c<6>(qi::_val) = qi::_1 ] )
             >> -('#' >> fragment);
     };

url_parser.hh

@@ -11,7 +11,7 @@ struct URL
 	std::string username;
 	std::string password;
 	std::string host;
-	int         port = 0; // port 0 means: default port: 80 for HTTP, 443 for HTTPS
+	unsigned    port = 0; // port 0 means: default port: 80 for HTTP, 443 for HTTPS
 	std::string path_and_query = "/";  // no need to split them down anymore
 	std::string fragment;
 };