fix flickering video OSD
Merge pull request #3643 from FernetMenta/osd

fix flickering video OSD
[substr] ensure position is within range
[date/time] validate strings prior to taking substr()
[infotypes] improve validation of strings
[cddb] improved string validation
[networkosx] improve validation of commandline return strings
[cosmetic] adds comments regarding assumptions of string format
[videodb] fix query in GetMusicVideoAlbumsByName
[cosmetics] adds TODO:STRING_CLEANUP to various places in the code that could do with a spring clean
Merge pull request #3654 from jmarshallnz/substr_fixes

Validation substr() usage prior to plowing ahead.
[pvr] bump add-ons (fix version of addon.gui)
use correct settings descripting text for screensaver fixes #14691
fixed: Compile error with FileFactory test + cosmetics
FIX: fixups std::string rfind + npos
Merge pull request #3659 from koying/quickpr2

FIX: fixups std::string rfind + npos
fixed: Compile error in test for StringUtils::Format
[musicdb] fix: fix support for .nfos and better handling for scrapers that don't return artist credits

The real underlying cause here is the change in the structure of the .nfo files.
That should be documented so folks start to update their .nfos and other scrapers.
Merge pull request #3657 from koying/quickpr

Stagefright fixes
[lang] update of internal addon language files