HowTo: Finit on Alpine Linux 3.4

Mini HowTo with config files :)

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

contrib/alpine/README.md

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+HowTo: Finit on Alpine Linux 3.4
+=================================
+
+This is a mini-howto for booting a very basic Alpine Linux with Finit.
+It is assumed that the user has already installed a compiler, C library
+header files, and other tools needed to build a GNU configure based
+project.
+
+To start with you need to first install [libuEv][] and [libite][], by
+default they install to `/usr/local` and Alpine's `pkg-config` does not
+look for libraries and header files there.  So the `PKG_CONFIG_LIBDIR`
+environment variable has to be used:
+
+	alpine:~/finit# PKG_CONFIG_LIBDIR=/usr/local/lib/pkgconfig ./configure \
+		--enable-embedded --enable-rw-rootfs --enable-inetd-echo-plugin    \
+		--enable-inetd-chargen-plugin --enable-inetd-daytime-plugin        \
+		--enable-inetd-discard-plugin --enable-inetd-time-plugin           \
+		--with-heading="Alpine Linux 3.4" --with-hostname=alpine
+
+The plugins are optional, but the other configure flags are *not*.
+
+    alpine:~/finit# make all install
+
+The installation will skip setting up `/sbin/init`, because it already
+exists, and Alpine is hard coded to use it.  So you have to change the
+symlink yourself to point to `finit` instead of `/bin/busybox`.
+
+Before rebooting, make sure to install `/etc/finit.conf` and the glue
+`/etc/rc.local` from this directory -- check them both if they need to
+be tweaked for your installation, you may not run Dropbear SSH or speak
+Swedish ...
+