Added <string.h> include for strdup() declaration (see POSIX.1)
Added <string.h> include for strdup() declaration (see POSIX.1)

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