Allow passing extra flags to configure with depends builds.
[osx/mavericks] - on mavericks don't use pbo rendering with intel gpus as it might result in distorted rendering (ripple)
[CEC] fixed - screensaver being activated sends the tv to standby, which makes the TV send another standby command. this standby command sent the PC to standby in some occasions
[CEC] increased SCREENSAVER_TIMEOUT from 10 to 20 seconds. philips sends another standby command after it's powered everything down, which takes up to 15 seconds (20 to be on the safe side)
Merge pull request #3813 from opdenkamp/morececfixes

[CEC] fixed PC going to standby when the screensaver is activated
HttpHeader::GetCharset: remove unused variable
Merge pull request #3810 from t-nelson/depends_config_extra

Allow passing extra flags to configure with depends builds.
[depends] fixed, bad option on unzip, -o will overwrite and -q will keep it quiet
Merge pull request #3809 from Memphiz/fixripple2

[osx/mavericks] - on mavericks don't use pbo rendering with intel gpus