Update the docs that list sections in keystone.conf
Update the docs that list sections in keystone.conf

The current docs are wildly out of date, and need to be updated
to actually show what are valid sections in keystone.conf

Change-Id: Icaced2499c6e05e0abfbb45abfbfd416a67d72e9

dims/keystone,ajayaa/keystone,himanshu-setia/keystone,maestro-hybrid-cloud/keystone,rushiagr/keystone,nuxeh/keystone,dstanek/keystone,maestro-hybrid-cloud/keystone,nuxeh/keystone,vivekdhayaal/keystone,dstanek/keystone,blueboxgroup/keystone,mahak/keystone,cernops/keystone,jumpstarter-io/keystone,dims/keystone,rajalokan/keystone,cernops/keystone,vivekdhayaal/keystone,takeshineshiro/keystone,openstack/keystone,rajalokan/keystone,openstack/keystone,rushiagr/keystone,ilay09/keystone,roopali8/keystone,klmitch/keystone,ajayaa/keystone,jamielennox/keystone,UTSA-ICS/keystone-kerberos,roopali8/keystone,ging/keystone,ilay09/keystone,rajalokan/keystone,nuxeh/keystone,promptworks/keystone,idjaw/keystone,mahak/keystone,jumpstarter-io/keystone,idjaw/keystone,jamielennox/keystone,dstanek/keystone,MaheshIBM/keystone,jonnary/keystone,ging/keystone,jumpstarter-io/keystone,mahak/keystone,jonnary/keystone,promptworks/keystone,openstack/keystone,ilay09/keystone,klmitch/keystone,MaheshIBM/keystone,vivekdhayaal/keystone,blueboxgroup/keystone,promptworks/keystone,rushiagr/keystone,UTSA-ICS/keystone-kerberos,takeshineshiro/keystone,himanshu-setia/keystone