Add global configuration for proxy player
Add global configuration for proxy player

Add global $wgKalturaEnableProxyData to enable passing proxyData for
external content to be used with player.
Data will be passed on the filter freeText field.

slash851/mwEmbed,omridevk/mwEmbed,joanpuigsanz/mwEmbed,slash851/mwEmbed,kaltura/mwEmbed,slash851/mwEmbed,alexmilk/mwEmbed,matsuu/mwEmbed,abaylis/mwEmbed,SVSG/mwEmbed,safarijv/mwEmbed,kaltura/mwEmbed,bordar/mwEmbed,bordar/mwEmbed,bordar/mwEmbed,abaylis/mwEmbed,alexmilk/mwEmbed,FlixMaster/mwEmbed,omridevk/mwEmbed,safarijv/mwEmbed,kaltura/mwEmbed,vladm3/mwEmbed,joanpuigsanz/mwEmbed,SVSG/mwEmbed,tanyaLibatter/mwEmbed,abaylis/mwEmbed,vladm3/mwEmbed,DBezemer/mwEmbed,DBezemer/mwEmbed,bordar/mwEmbed,matsuu/mwEmbed,matsuu/mwEmbed,FlixMaster/mwEmbed,tanyaLibatter/mwEmbed,joanpuigsanz/mwEmbed,FlixMaster/mwEmbed,vladm3/mwEmbed,tanyaLibatter/mwEmbed,panda-os/mwEmbed,panda-os/mwEmbed,vladm3/mwEmbed,FlixMaster/mwEmbed,panda-os/mwEmbed,matsuu/mwEmbed,omridevk/mwEmbed,omridevk/mwEmbed,DBezemer/mwEmbed,abaylis/mwEmbed,tanyaLibatter/mwEmbed,DBezemer/mwEmbed,SVSG/mwEmbed,joanpuigsanz/mwEmbed,kaltura/mwEmbed,safarijv/mwEmbed,SVSG/mwEmbed,alexmilk/mwEmbed,safarijv/mwEmbed,panda-os/mwEmbed,slash851/mwEmbed,alexmilk/mwEmbed