* Update HELPSYS to find CLHS (Common Lisp HyperSpec) and lispusers/library docs
* restore lost edits; fix package inclusion for XCL and LISP
* mere with previous commit
* try again
* Eliminate string arguments to OPENTEXTSTREAM #666
Empty string replaced by NIL, mostly. Otherwise, string wrapped in OPENSTRINGSTREAM. TEDIT hasn't yet been modified, just all the callers.
* INDEX, NGROUP: move to obsolete #667
* HELPSYS: Add proper FILETYPE property
* ROOMS files: Also updated for TEDIT string arguments