Have VSS_resolve() call VSS_parse() and only use the provided port
argument as a default, if the host argument does not specify a port.

Elminate most separate calls to VSS_parse()

Make it possible to specify address and port of backends in VCL using
only the .host field.



git-svn-id: http://www.varnish-cache.org/svn/branches/2.1@5332 d4fa192b-c00b-0410-8231-f00ffab90ce4