in explicit SSL, socket factory SSL should be used
in explicit SSL, socket factory SSL should be used

git-svn-id: 156d99fefae263fe7040597dc4e7b98918e91509@395555 13f79535-47bb-0310-9956-ffa450edef68

CasparLi/ftpserver,saaconsltd/mina-ftpserver,seeburger-ag/ftpserver,CasparLi/ftpserver,seeburger-ag/ftpserver,apache/ftpserver,devdem/osgi-ftpserver,apache/ftpserver,seeburger-ag/ftpserver,saaconsltd/mina-ftpserver,CasparLi/ftpserver,devdem/osgi-ftpserver,gkopff/mina-ftpserver,gkopff/mina-ftpserver,devdem/osgi-ftpserver,apache/ftpserver