support for polml-5.5.2;
support Thread.numPhysicalProcessors of polyml-5.5.2 (according to SVN 1890);
clarified max_threads: store plain value internally, reproduce result only on startup, and thus avoid potential system overhead;
# -*- shell-script -*- :mode=shellscript:
#
# Isabelle user settings sample -- for use in $ISABELLE_HOME_USER/etc/settings
ISABELLE_BUILD_OPTIONS="browser_info document=pdf"
ISABELLE_LOGIC=HOL