[net] Build broken by commit "Prevent serialization"

[Gary Gregory]

Hi All & Sebb,

Git bisect tells me the commit below broke the build and it's been broken
ever since. Please run a local build before you commit.

991b775f2052e150c4c16d1c1cd2073021d40c2e is the first bad commit
commit 991b775f2052e150c4c16d1c1cd2073021d40c2e
Author: Sebb <s...@apache.org>
Date:   Wed Dec 15 00:18:48 2021 +0000

    Prevent serialization

    It is not useful and is unlikely to work properly.

 src/changes/changes.xml                              |  4 ++++
 .../apache/commons/net/ProtocolCommandSupport.java   | 18
+++++++++++++++++-
 .../java/org/apache/commons/net/ftp/FTPFile.java     | 20
+++++++++++++++++++-
 .../java/org/apache/commons/net/ntp/TimeStamp.java   | 16 ++++++++++++++++
 .../org/apache/commons/net/util/ListenerList.java    | 15 +++++++++++++++
 5 files changed, 71 insertions(+), 2 deletions(-)

Please revert or fix.

[ERROR] Failures:
[ERROR]   FTPTimestampParserImplTest.testParseTimestampWithSlop:474
test.slop.roll.back.year expected:<1> but was:<0>

TY,
Gary