avahi: Don't advertise example services by default

The example service files are placed into /etc/avahi/services when we
run `make install` for avahi. This results in ssh and sftp-ssh services
being announced by default even if no ssh server is installed in an
image.

These example files should be moved away to another location such as
/usr/share/doc/avahi (taking inspiration from Arch Linux).

(From OE-Core rev: c88cf750f26f6786d6ba5b4f1f7e5d4f0c800e6e)

Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/avahi/avahi.inc

@@ -77,6 +77,11 @@ do_install() {
 	rm -rf ${D}${datadir}/dbus-1/interfaces
 	test -d ${D}${datadir}/dbus-1 && rmdir --ignore-fail-on-non-empty ${D}${datadir}/dbus-1
 	rm -rf ${D}${libdir}/avahi
+
+	# Move example service files out of /etc/avahi/services so we don't
+	# advertise ssh & sftp-ssh by default
+	install -d ${D}${docdir}/avahi
+	mv ${D}${sysconfdir}/avahi/services/* ${D}${docdir}/avahi
 }
 
 PACKAGES =+ "${@bb.utils.contains("PACKAGECONFIG", "libdns_sd", "libavahi-compat-libdnssd", "", d)}"