XSB Src (SVN)-old

Fixed test for building trace to correctly check pflags[BACKTRACE] (and
not flags[BACKTRACE]).

Added import of findall/3 in compilation of answer subsumption.

refactored and introduced useful subpredicate:
psc_modname_filename/3, to get module name and file name for a given PSC addr,
and exported it, for use elsewhere.

Changed to remove spurious warning.

FIxed formatting issue.

Changed file_close to close (which is the better one to use...)

In parse: added standardize-variables-apart when expand_term returns a list
(very obscure, but a student ran into this, and it seems reasonable to do.)
In compile: cleaned up commenting out of ti-indexing (so no warnings, and
not loaded.)

renamed util.* into sgmlutil.* to avoid name clashes.

renamed util.* into sgmlutil.* to avoid name clashes.

escape spaces in XSB directories and the file being compiled.
otherwise, XSB barks when run in directories that have spaces, :, etc.
This change affexts only unix-based systems, not Windows (but it does affect
Cygwin).