net/seda: does not compile with jdk25 and deprecate

Error with jdk25:
[javac] /wrkdirs/usr/ports/net/seda/work/seda-release-20020712/seda/src/seda/sandStorm/internal/ATTIC/AggTPSThreadManager.java:124: error: cannot find symbol
[javac] tg.stop();
[javac] ^
[javac] symbol: method stop()
[javac] location: variable tg of type ThreadGroup

Note that the original author of the SEDA framework already
doubted some parts of it in a blog from 2010.
https://matt-welsh.blogspot.com/2010/07/retrospective-on-seda.html

PR: 293559
Approved-by: no maintainer