Some operators provide IP address of the MMS proxy
prepending zeros to each number shorter then 3 digits,
e.g. "192.168.094.023" instead of "192.168.94.23".
That may look nicer but it's actually wrong because
the numbers starting with zeros are interpreted as
octal numbers. In the example above 023 actually means
16 and 094 is not a valid number at all.

In addition to publishing these broken settings on their
web sites, some of the operators send them over the air,
in which case we can't even blame the user for entering
an invalid IP address. We better be prepared to deal with
those.

Since nobody in the world seems to be actually using the
octal notation to write an IP address, let's remove the
leading zeros if we find them in the host part of the MMS
proxy URL.

It allows the handler to ignore duplicate push notifications.

We never reuse the connection and operators usually reply with
"Connection: close" anyway. Also, some carriers actually require
Connection to be "close"

DNA Finland recently started to include X-Mms-Transaction-ID in
M-Delivery.ind even though it's not supposed to be there at all.
We should allow (and ignore) it.

Defaults for things like user agent and UAProfile should be modifiable
using a file installed by the hardware adaptation package.

Logging functionality that used to be part of mms-engine has been
migrated to libglibutil

Some tests did't delete temporary directories.

Processing of downloaded messages is now finished before the next
download is started.

This way it will end up in the tarball generated by MMS Logger app,
and it's generally useful for debugging.

It's not being used at the moment but we may need it soon.

We need to use org.nemomobile.ofono.ModemManager API to notify ofono
that we need to download MMS so that it enables mobile data for the
appropriate SIM. If it's different from the currently selected data SIM,
then connman will be prevented from using mobile data while MMS download
is taking place.

These are mostly for convenience, the actual OBS build is using makefiles.

This makes the log easier to read.

Allows to forward operator's errors messages to the user.

New method readReportSendStatus has been added to org.nemomobile.MmsHandler
D-Bus interface. It's called when mms-engine is done with sending the read
report, successfully or not. If read report sending fails, the handler has
a chance to retry.