Performance test suite

[Niklas Gustavsson <ni...@protocol7.com>]

Hi all

I've added a performance test suite for tests specifically tailored to 
run many times and therefore not suited for inclusion into our regular 
tests. You can find it here:
https://svn.apache.org/repos/asf/incubator/ftpserver/trunk/perftest

Right now there are only some basic tests in there that I use for 
verifying that changes I make don't break concurrency or hurt performance.

These tests do not run by default from the M2 build, you have to run it 
explicitly. That's because the tests are somewhat complex and tend to 
make you run out of sockets. If that happens you have to wait until 
sockets in TIME_WAIT mode times out (default is 240 seconds).

/niklas