Update sites.xml
Update sites.xml

Added new sources, commented out OpenDNS section as most users won't have API key.
crunchsec/TekDefense-Automater,wroersma/TekDefense-Automater,CyberScions/TekDefense-Automater,mmaul/TekDefense-Automater,vineyard/TekDefense-Automater,glennbarrett/TekDefense-Automater,mixedup4x4/TekDefense-Automater,mcm/TekDefense-Automater,cephurs/TekDefense-Automater,gulayyener/TekDefense-Automater,CSIRTUK/TekDefense-Automater,1aN0rmus/TekDefense-Automater,mmaul/TekDefense-Automater,Theethical/TekDefense-Automater,securityigi/TekDefense-Automater,colinmahns/TekDefense-Automater,scherma/TekDefense-Automater