Patch Makefile so that nuttcp will build sanely on Debian systems.

Author: Chris Taylor <ctaylor@debian.org>
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
-APP = nuttcp-8.2.2
-#EXTRAVERSION=-pre1
+APP = nuttcp
+EXTRAVERSION=
+DESTDIR=
 CC = gcc -Wall
-#OPT = -g -O0
-OPT = -O3
+OPT = -g -O2
 CFLAGS = $(OPT) $(NOIPV6)
 LIBS = 
 ifneq ($(NOIPV6),)
@@ -69,3 +69,13 @@ clean:
 tar:
 	(cd ..; $(TAR) cfj $(APP)$(EXTRAVERSION).tar.bz2 --exclude $(APP)/binaries --exclude $(APP)/bin --exclude $(APP)/cygwin/*.bz2 --exclude $(APP)/rpm $(APP)$(EXTRAVERSION)$(APPEXT))
 	(cd ..; $(TAR) cfj $(APP)$(EXTRAVERSION).rpm.tar.bz2 --exclude $(APP)/binaries --exclude $(APP)/bin --exclude $(APP)/cygwin  --exclude $(APP)/missing --exclude $(APP)/rpm --exclude $(APP)/xinetd.d $(APP)$(EXTRAVERSION)$(APPEXT))
+
+install:
+	install -m 0755 -d ${DESTDIR}/usr/bin
+	install -m 0755 nuttcp ${DESTDIR}/usr/bin/nuttcp
+	install -m 0755 -d ${DESTDIR}/usr/share/man/man8
+	install -m 0644 nuttcp.8 ${DESTDIR}/usr/share/man/man8/
+	install -m 0755 -d ${DESTDIR}/usr/lib/systemd/system
+	install -m 0644 systemd/nuttcp.socket ${DESTDIR}/usr/lib/systemd/system/
+	install -m 0644 systemd/nuttcp@.service ${DESTDIR}/usr/lib/systemd/system/
+
