recording: Allow configuring recording metadata to use https

This allows configuring a server to use https without having to edit
any ruby files directly.

(Ideally, the metadata files wouldn't include the server name/protocol
at all; that should be set dynamically by bbb-web, but this is what we
have for now.)

record-and-playback/core/scripts/bigbluebutton.yml

@@ -12,6 +12,7 @@ log_dir: /var/log/bigbluebutton
 recording_dir: /var/bigbluebutton/recording
 published_dir: /var/bigbluebutton/published
 playback_host: 10.0.3.203
+playback_protocol: http
 
 # For DEVELOPMENT
 # This allows us to run the scripts manually

record-and-playback/presentation/scripts/publish/presentation.rb

@@ -927,7 +927,8 @@ def processChatMessages
 	$process_dir = "#{recording_dir}/process/presentation/#{$meeting_id}"
 	BigBlueButton.logger.info("setting publish dir")
 	publish_dir = simple_props['publish_dir']
-	BigBlueButton.logger.info("setting playback host")
+	BigBlueButton.logger.info("setting playback url info")
+        playback_protocol = bbb_props['playback_protocol']
 	playback_host = bbb_props['playback_host']
 	BigBlueButton.logger.info("setting target dir")
 	target_dir = "#{recording_dir}/publish/presentation/#{$meeting_id}"
@@ -995,7 +996,7 @@ def processChatMessages
 			b.end_time(real_end_time)
 			b.playback {
 				b.format("presentation")
-				b.link("http://#{playback_host}/playback/presentation/0.9.0/playback.html?meetingId=#{$meeting_id}")
+				b.link("#{playback_protocol}://#{playback_host}/playback/presentation/0.9.0/playback.html?meetingId=#{$meeting_id}")
 				b.processing_time("#{processing_time}")
 				b.duration("#{recording_time}")
 			}