Checklist for official releases

 ===============================

 - test mosml, polyml-5.0, polyml-4.1.3, polyml-4.1.4, polyml-4.2.0, x86-solaris, x86-cygwin;

 - test ProofGeneral;

 - 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, ~isabelle/website;

 - maintain Docs:

     doc-src/Dirs

     doc/Contents

 - maintain Logics:

     build

     lib/Tools/makeall

     lib/html/library_index_content.template

 - after release: 

     commit new ~isabelle/website/include/documentationdist.include.html to website SVN