[mythtv] A bunch of bug fixes

[warpme]

> Wiadomość napisana przez Lawrence Rust <lvr at softsystem.co.uk> w dniu 30.12.2015, o godz. 18:33:
> 
> Hi,
> 
> I have around 50 patches to various minor bugs that I've been using for
> a while now.  They mainly cover the frontend and video playback.  None
> of them are significant changes so I was hoping to commit them before
> the 0.28 release.  Before I do so, I wanted to air them to ensure that
> there are no serious gotchas.  So I've created a new branch:
> devel/lvr/bugfixes.
> 
> Please let me know if you spot any problems or have any objections.
> 
> Thanks.
> 
> -- Lawrence Rust
> 
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Lawrence,
Generally I have very good experience with with Your patches. 
Usually You are addressing functional aspects easily recognized by user so for me Your patches are always welcome.

Regarding JYA comment:

I remember this situation from 1.5y ago.
I apply almost full set of Your patches at that time and results were very good except broken LiveTV history walking.
Your patch set introduced regression in this area.

This function - at that time - was recently nicely fixed by JYA so I fully understand JYA frustration by this regression.
IIRC I have to revert _more-or-less_ revert set of patches like You mention in JYA replay:

0128796 Revert "Player: Enable AVSync to recover quicker after a seek or program change"
d08503e Revert "Player: Finer a/v sync adjustments"
2bdb7cc Revert "Player: Amalgamate and simplify SwitchTo and JumpToProgram"
6634791 Revert "Player: Increase OpenFile timeout to allow playing encrypted isos on a remote FE"

I wasn’t happy to revert them as some of above patches gives me really fast playback skip/ffw and practically not noticeable LiveTV transitions.

I remember, ideally for me was to fix above patches to not regressing LiveTV history walking. 
At that time I remember this can resulting with almost perfectly working system for me :-)  

Pls keep Your great work!