Fix two problems that could prevent refreshed proxies from being forwarded to the gt4 delegation service: * The expiration time of the forwarded proxy was bounded at 12 hours, even   if the original had a shorter lifetime. * Compared proxy expration to a relative time instead of an absolute time.
Fix two problems that could prevent refreshed proxies from being forwarded
to the gt4 delegation service:
* The expiration time of the forwarded proxy was bounded at 12 hours, even
  if the original had a shorter lifetime.
* Compared proxy expration to a relative time instead of an absolute time.

djw8605/condor,djw8605/condor,zhangzhehust/htcondor,mambelli/osg-bosco-marco,djw8605/condor,bbockelm/condor-network-accounting,djw8605/htcondor,bbockelm/condor-network-accounting,djw8605/htcondor,neurodebian/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,djw8605/condor,zhangzhehust/htcondor,djw8605/htcondor,mambelli/osg-bosco-marco,djw8605/htcondor,htcondor/htcondor,neurodebian/htcondor,djw8605/htcondor,neurodebian/htcondor,htcondor/htcondor,neurodebian/htcondor,bbockelm/condor-network-accounting,neurodebian/htcondor,htcondor/htcondor,htcondor/htcondor,djw8605/condor,djw8605/htcondor,bbockelm/condor-network-accounting,mambelli/osg-bosco-marco,zhangzhehust/htcondor,zhangzhehust/htcondor,djw8605/htcondor,neurodebian/htcondor,mambelli/osg-bosco-marco,mambelli/osg-bosco-marco,htcondor/htcondor,zhangzhehust/htcondor,mambelli/osg-bosco-marco,djw8605/condor,neurodebian/htcondor,htcondor/htcondor,djw8605/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,bbockelm/condor-network-accounting,htcondor/htcondor,htcondor/htcondor,bbockelm/condor-network-accounting,djw8605/condor,mambelli/osg-bosco-marco,bbockelm/condor-network-accounting,djw8605/condor,djw8605/htcondor,zhangzhehust/htcondor,zhangzhehust/htcondor,bbockelm/condor-network-accounting,mambelli/osg-bosco-marco