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

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

In addition to all kinds of integers we will also accept a double value
as long as it falls into [0..UINT_MAX] range.

We will accept any kind of integer where we expect uint32 provided
that its value falls into [0..UINT_MAX] range.

Previously, MMS settings were stored right in the IMSI directory at the
root of the dconf namespace. They have been moved to /imsi/ folder and
MMS settings now live in the mms subfolder, i.e. /IMSI/ -> /imsi/IMSI/mms/

Old settings are migrated to the new location the first time they are
requested. Instead of GSettings we now directly use DConf because it
appears to be impossible to properly implement migration with GSettings.
That makes gschema obsolete but we need to keep it around for backward
compatibility reasons.

It's http://static.jolla.com/uaprof/Jolla.xml and from now on
it should be permanent. And it actually works.

The value is configurable from the command line and via GSettings