Replaced subscribe.{h,c} by stripped-down async handling.

Makefile.in

@@ -12,18 +12,18 @@ VERSION:=@PACKAGE_VERSION@
 @SET_MAKE@
 SHELL = /bin/sh
 MKDIR = mkdir
-ETAGS = etags
+ETAGS = @ETAGS@
 
 abs_builddir = @abs_builddir@
 top_builddir = @top_builddir@
 package = @PACKAGE_TARNAME@-@PACKAGE_VERSION@
 
 # files and flags
-SOURCES:= pdu.c net.c debug.c encode.c uri.c list.c subscribe.c resource.c hashkey.c \
-	 str.c option.c
+SOURCES:= pdu.c net.c debug.c encode.c uri.c list.c resource.c hashkey.c \
+	 str.c option.c async.c
 OBJECTS:= $(patsubst %.c, %.o, $(SOURCES))
-HEADERS:=coap.h config.h debug.h pdu.h net.h encode.h uri.h list.h mem.h subscribe.h \
-	str.h option.h bits.h uthash.h resource.h hashkey.h
+HEADERS:=coap.h config.h debug.h pdu.h net.h encode.h uri.h list.h mem.h \
+	str.h option.h bits.h uthash.h resource.h hashkey.h async.h
 CFLAGS:=-Wall -std=c99 -pedantic @CFLAGS@
 CPPFLAGS:=@CPPFLAGS@
 DISTDIR=$(top_builddir)/$(package)
@@ -79,7 +79,9 @@ dist:	$(FILES) $(SUBDIRS)
 	tar czf $(package).tar.gz $(DISTDIR)
 
 TAGS:	
-	$(ETAGS) -o $@.new $(SOURCES) && mv $@.new $@
+	$(ETAGS) -o $@.new $(HEADERS) 
+	$(ETAGS) -a -o $@.new $(SOURCES) 
+	mv $@.new $@
 
 .gitignore:
 	echo "core\n*~\n*.[oa]\n*.gz\n*.cap\n$(PROGRAM)\n$(DISTDIR)\n.gitignore" >$@