clarified "this_name" vs. former "reset" feature -- imitate the latter by loading other session sources directly;
# -*- shell-script -*- :mode=shellscript:
case "$ISABELLE_PLATFORM" in
*-darwin)
ISABELLE_JDK_HOME="$(/usr/libexec/java_home -v 1.6)"
;;
*)
ISABELLE_JDK_HOME="$COMPONENT/${ISABELLE_PLATFORM64:-$ISABELLE_PLATFORM}/jdk1.6.0_31"
;;
esac