boinc @4.11 outdated

The version of boinc in MacPorts is badly outdated, and will operate poorly when connected to the boinc server. In addition boinc itself has an intel mac version now at 5.11.20. The portfile needs to come up to 5.11.27 or it serves no purpose. Since an intel mac version is available perhaps this port should be deleted if it cant be brought up to 5.11.27. Note that this client is run as a screensaver and is therefore likely to be installed and forgotten as long as the screensaver part functions. The distributed computing aspect is another matter and may be overlooked by end user. To avoid causing trouble to the boinc *server*, something needs to be done. ticket made in trac.