bundles/org.eclipse.packagedrone.repo.manage.system/src/org/eclipse/packagedrone/repo/manage/system/internal/SystemServiceImpl.java
protected String makePrefixFromOsgiProperties ()
    {
        final String port = System.getProperty ( "org.osgi.service.http.port" );
        if ( port == null )
        {
            return null;
        }

        final StringBuilder sb = new StringBuilder ();
        sb.append ( "http://" ).append ( discoverHostname () );
        if ( !"80".equals ( port ) )
        {
            sb.append ( ':' ).append ( port );
        }
        return sb.toString ();
    }
protected String makePrefixFromOsgiProperties ()
    {
        final String port = System.getProperty ( "org.osgi.service.http.port" );
        if ( port == null )
        {
            return null;
        }

        final StringBuilder sb = new StringBuilder ();
        sb.append ( "http://" ).append ( discoverHostname () );
        if ( !"80".equals ( port ) )
        {
            sb.append ( ':' ).append ( port );
        }
        return sb.toString ();
    }
Make the prefix by guessing the port from the OSGi settings