Add trivial stub_debug functions.
Add trivial stub_debug functions.

glenwiley/getdns,dkg/getdns,Acidburn0zzz/getdns,dkg/getdns,dkg/getdns,shane-kerr/getdns,glenwiley/getdns,huitema/getdns,smogali/getdns,huitema/getdns,dkg/getdns,shane-kerr/getdns,smogali/getdns,glenwiley/getdns,shane-kerr/getdns,shane-kerr/getdns,smogali/getdns,Acidburn0zzz/getdns,glenwiley/getdns,huitema/getdns,smogali/getdns,Acidburn0zzz/getdns,huitema/getdns,Acidburn0zzz/getdns