If a client used the way to respond to a NOTIFY call described in UDA 1.1:

HTTP/1.1 200 OK

and nothing else, libsoup doesn't know that there was no body to come and was
running into a timeout, not sending the other messages queued on this
connection since we request the connection to be kept alive.

By adding "Connection: close" to the NOTIFY message, libsoup will know that
the message is done since the client closes the connection.

If a client misbehaves and doesn't close the connection, we're still having a
problem. This should be considered a work-around and a nicer solution with
libsoup needs to be found.

Based on patch by Branislav Katreniak

Fixes:
    https://bugzilla.gnome.org/show_bug.cgi?id=672830

* Detect $srcdir from command line
* Create m4 subdir under $srcdir, not $builddir
* Source gnome-autogen.sh in the same shell so that $srcdir is applied

https://bugzilla.gnome.org/show_bug.cgi?id=682580

Otherwise it seems to break where localhost resolves to ::1 since we don't
handle IPv6 properly.

https://bugzilla.gnome.org/show_bug.cgi?id=685643

Call it for old versions.

https://bugzilla.gnome.org/show_bug.cgi?id=688411

If a control point was looking for a service instead of a device it was
only responding on exact version matches, but according to UDA also
higher versions are compatible as well.

This patch introduces a compare function that takes the service version
into account instead of a simple string comparison.

https://bugzilla.gnome.org/show_bug.cgi?id=689028

https://bugzilla.gnome.org/show_bug.cgi?id=687621

https://bugzilla.gnome.org/show_bug.cgi?id=687320

Putting stuff in Requires means applications using
this library will link against that when it might
not be needed at all because they use none of that
libraries symbols directly.

If only the cflags is needed (because public headers
includes headers from that package) they
can be private to avoid uselessly linking.

See #2 in http://people.freedesktop.org/~dbn/pkg-config-guide.html#faq

https://bugzilla.gnome.org/show_bug.cgi?id=685477

This field is not parsed at all by pkg-config! (cf. Requires.private)
Apparently whatever is listed in it is not needed.

https://bugzilla.gnome.org/show_bug.cgi?id=685477

Needed for correct GIR file + pkg-config data.

https://bugzilla.gnome.org/show_bug.cgi?id=679204