New issues for HTTPServer class

[Gelareh_Taban]

Issues have been opened for following. Please review and comment.

(1) In HTTPServer specifications, Port=0 should give error, Use Port=nil
for kernel assigned

In HTTPServer specification, `Port:0` give error, should be `Port:nil` for kernel assigned ports

(2) Use sockaddr structure instead of port number in HTTPServer
specifications

Use sockaddr structure instead of port for connection address