Recording wall clock time in OSD

[miguel@…]

This adds a textarea widget named "wallclocktime" to the OSD that will display the local playing wall clock time of the recording being played. Its very useful to me, don't if other will want it. I've being using it for 3 week without issues.

PR: ​https://github.com/MythTV/mythtv/pull/127

Example snippet from my osd.xml theme file, moving the description text widget down and showing the recording time in its place.

       <textarea name="wallclocktime">                                                                                                                                                                                                
            <font>small</font>
            <area>10,5,1700,40</area>
            <align>hcenter, bottom</align>
            <template>Wall clock: %1</template>
        </textarea> 
        <textarea name="description">
            <font>small</font>
            <area>10,70,1700,40</area>
            <align>hcenter,bottom</align>
            <template>%DESCRIPTION%
            %(|REMAININGTIME|)%%(|BEHINDTIME|)%%VALUE%%UNITS%</template>
        </textarea>