clarify language

git-svn-id: https://svn.r-project.org/R/trunk@63247 00db46b3-68df-0310-9c12-caf00c1e9a41
report JAVA_HOME as it may be referred to in other settngs

git-svn-id: https://svn.r-project.org/R/trunk@63249 00db46b3-68df-0310-9c12-caf00c1e9a41
indentation
add exception for splusTimeDate


git-svn-id: https://svn.r-project.org/R/trunk@63251 00db46b3-68df-0310-9c12-caf00c1e9a41