Added threading, progress and some comments, nearly done

Joel Grunbaum

2020-10-21 8e7ea6742a94ea62b421d7184e9eab17fb5da934

 Makefile

@@ -2,7 +2,7 @@
_OBJ=main.o dns.o slist.o
_DEPS=dns.h servers.h slist.h
IDIR=include
CFLAGS=-I$(IDIR) -Wall -g
CFLAGS=-I$(IDIR) -Wall -g -lpthread
ODIR=obj
SRCDIR=src