vncserver: enable local testing

It uses the dir it was ran from to find other binaries. If I run it
locally as unix/vncserver, I want to use /usr/bin for other binaries.

unix/vncserver

@@ -31,6 +31,9 @@ $slashndx = rindex($0, "/");
 if($slashndx>=0) {
     $exedir = substr($0, 0, $slashndx+1);
 }
+if ($exedir =~ m!^unix/!) {
+   $exedir = "/usr/bin/";
+}
 
 &SanityCheck();