we now detect that the server is sending us a log which we did not request
by testing the info in the fake Rotate event.
I also changed code to not print the fake Rotate which describes the
log we asked for (it's always the first received event but old masters
may not send it).


client/mysqlbinlog.cc:
  Detect when the master is sending us a binlog which we have not requested,
  then stop.
  Skip the fake Rotate event if there is one (there may be none if
  the server to which we connect is < 4.0.14).
mysql-test/r/mysqlbinlog.result:
  result update: master-bin.000002 is not printed anymore (as mysqlbinlog
  stops at the end of the requested log, master-bin.000001).
mysql-test/t/mysqlbinlog.test:
  comment is wrong now