[cppmyth] Support for protocol 82 (IdIdO)

- proto: Add field "RecordedId" to ProgramInfo at position 49
- wsapi: Map field "RecordedId" to Recording.recordedId
[cppmyth] Support for ChannelService 1.5

- GetChannelInfoList82
[mythtv] Unhide the parameter "wsport" in setting screen

Default value is 6544. But user has to change it when needed.