XSB Src (SVN)-old

added remove_lib_dir/1

backed out the standardization change to load_dunc/2, which was incorrect.
The other standardization changes stay.

remove xwams before running the tests so that the tests would be clean.

Added path_sysop standardize (to resolve symlinks & expand) and readlink (to resolve 1 syslink).
Change consult/loader to use API to manipulate consult_file_loaded and load_dyn_file_loaded. That API always standardizes filenames before doing anything. Load and add_lib_dir also standardize files.

no longer tries to remove test_ec.xwam, which led to a spurious warning.

got rid of possible memory leak in file_readlink

added the forgotten return statement in the windows branch

file standardization now first expands the file name and only then replaces symlinks with the real thing.

Added missing length to a call to strncpy.

added a new primitive to file_io:path_sysop -
path_sysop(standardize,In,Out)
Converts symlinks to regular files. For regular files is identity.
On Windows is identity -- for now.
The idea is to use this in consult and load to always eliminate symlinks.
In this way, XSB won't think that a symlink is a different file and will not be unnecessarily reloading modules.