Adding check so that NioListener.start() can not be called on a started listener (FTPSERVER-386)

git-svn-id: https://svn.apache.org/repos/asf/mina/ftpserver/trunk@997310 13f79535-47bb-0310-9956-ffa450edef68
2 files changed
tree: 025a463f5fa7453220e93c9394e19445442b21c2
  1. core/
  2. distribution/
  3. examples/
  4. ftplet-api/
  5. LICENSE.txt
  6. NOTICE.txt
  7. pom.xml