added in a bunch of "also_implments()" modifiers in order to preserve backwards compatibility of a pre-v6.1.11 syscall lib talking to a v6.1.11+ shadow.  also documented a description of the also_implements() modifier.
added in a bunch of "also_implments()" modifiers in order to preserve
backwards compatibility of a pre-v6.1.11 syscall lib talking to a
v6.1.11+ shadow.  also documented a description of the also_implements()
modifier.

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