Added optional, commented autoconfig directives for a few parameters.
Patch from Jaime Frey/(HT)Condor: test whether relative paths (as well
as absolute paths) sit in shared directories.
Patch from Jaime Frey/(HT)Condor. Adding 'manual' fallback for sge-helper.
Utilities from Jaime Frey/(HT)Condor to handle proxies via Globus API calls.