Checklist for official releases===============================- test mosml, polyml-5.2, polyml-5.1, polyml-5.0;- test sparc-solaris, x86-solaris;- test ProofGeneral;- test Scala wrapper;- check HTML header of library;- check CTRL-C, SIGINT in tty (also for external processes);- check persistent sessions with PG and Poly/ML 5.x;- Admin/update-keywords;- check ANNOUNCE, README, INSTALL, NEWS, COPYRIGHT, CONTRIBUTORS;- update https://isabelle.in.tum.de/repos/website;- maintain Docs: doc-src/Dirs doc/Contents- maintain Logics: build lib/Tools/makeall lib/html/library_index_content.template