- Catch OOM when creating torrent (tickets #364 and #366)

- Fix changing 'use open trackers' config setting (old bug)
- More TrackerClient fixes for no primary announce
- More BEValue.toString() improvements for debugging

apps/i2psnark/java/src/org/klomp/snark/Snark.java

@@ -394,6 +394,8 @@ public class Snark
          */
         else
           fatal("Cannot open '" + torrent + "'", ioe);
+      } catch (OutOfMemoryError oom) {
+          fatal("ERROR - Out of memory, cannot create torrent " + torrent + ": " + oom.getMessage());
       } finally {
           if (in != null)
               try { in.close(); } catch (IOException ioe) {}