hub/robots.txt: do not index pages and remove doc&policy pentry points
hub/robots.txt: do not index pages and remove doc&policy pentry points

tscholl2/smc,sagemathinc/smc,tscholl2/smc,tscholl2/smc,tscholl2/smc,sagemathinc/smc,sagemathinc/smc,sagemathinc/smc,tscholl2/smc