Use the real getnetbyname(), not the stub in resolv.c

libc/inet/Makefile

@@ -34,7 +34,7 @@ MOBJ2=encodeh.o decodeh.o encoded.o decoded.o lengthd.o encodeq.o \
 	decodeq.o lengthq.o encodea.o decodea.o encodep.o decodep.o \
 	formquery.o dnslookup.o resolveaddress.o resolvemailbox.o \
 	opennameservers.o closenameservers.o resolvename.o gethostbyname.o\
-	getnetbyname.o res_init.o res_query.o gethostbyaddr.o \
+	res_init.o res_query.o gethostbyaddr.o \
 	get_hosts_byname.o get_hosts_byaddr.o read_etc_hosts.o