make sure timestamps are converted to and from local time at the correct point
update mvn-infix-junit-sshd, rebuilt against junit 4.10

the reason is a binary incompatibility between junit 4.10 and older
versions that lets the JUnit tests fail because the SSHServerResource
uses a method that got removed in junit 4.10
FTP: added a combo to select the server timezone
renamed UISettings.formatSize() to Util.formatSize()
also support modified times of directories
new commandline argument --list <URL>, primarily for debugging