Provide a Makefile for automatic installs

Makefile

@@ -0,0 +1,42 @@
+all:
+	ocaml setup.ml -configure
+	ocaml setup.ml -build
+
+install:
+	groupadd --system srsly
+	useradd                     \
+		--system                  \
+		--gid srsly               \
+		--home /var/lib/srsly     \
+		--comment "srsly daemon"  \
+		--shell /bin/false        \
+		srsly
+	install -d -m0755 /etc/srsly
+	install -d -m0700 /etc/srsly/srs_secrets.d
+	install -d -m0755 /usr/lib/srsly
+	install -d -m0755 /usr/sbin
+	install -d -m0755 /var/lib/srsly
+	install -d -m0755 /var/lib/srsly/dev
+	install -d -m0755 /var/lib/srsly/etc
+	install -d -m0755 /var/lib/srsly/lib
+	install -m0600 etc/srslyd.conf /etc/srsly/srslyd.conf
+	install -m0700 _build/src/srsly.native /usr/sbin/srsly
+	install -m0700 _build/src/srsly_milter.native /usr/lib/srsly/srsly-milter
+	install -m0700 _build/src/srslyd.native /usr/lib/srsly/srslyd
+	touch /etc/srsly/srs_secret
+	chown root:root /etc/srsly/srs_secret
+	chmod 0600 /etc/srsly/srs_secret
+	srsly new-secret > /etc/srsly/srs_secret
+
+uninstall:
+	rm -r /etc/srsly
+	rm -r /usr/lib/srsly
+	rm -r /var/lib/srsly
+	rm /usr/sbin/srsly
+	userdel srsly
+
+clean:
+	ocaml setup.ml -clean
+
+distclean:
+	ocaml setup.ml -distclean

README.md

@@ -19,9 +19,8 @@ To build srsly you need to install its dependencies:
 
 Having those installed, simply run the following commands.
 
-    $ ocaml setup.ml -configure
-    $ ocaml setup.ml -build
-    # ocaml setup.ml -install
+    $ make
+    # make install
 
 It is also possible to build a Debian package with the command