find_orphans.py can't delete orphaned recording entries with non-ascii charcters in any attribute

[Karl Egly]

It appears as if deleteRecording (and related methods) wants to serialize the whole recording object instead of only channel id and start time. 0xDC being upper case U-Umlaut.

Traceback (most recent call last):
  File "/var/lib/mythtv2/find_orphans.py", line 230, in <module>
    main()
  File "/var/lib/mythtv2/find_orphans.py", line 214, in main
    opt[1](opt[2])
  File "/var/lib/mythtv2/find_orphans.py", line 129, in delete_recs
    rec.delete(True, True)
  File "/usr/lib/python2.7/dist-packages/MythTV/dataheap.py", line 363, in delete
    return self.getProgram().delete(force, rerecord)
  File "/usr/lib/python2.7/dist-packages/MythTV/mythproto.py", line 960, in delete
    res = int(be.deleteRecording(self, force=force))
  File "/usr/lib/python2.7/dist-packages/MythTV/mythproto.py", line 656, in deleteRecording
    [command,program.toString()]))
  File "/usr/lib/python2.7/dist-packages/MythTV/mythproto.py", line 155, in backendCommand
    return self._conn.command.backendCommand(data)
  File "/usr/lib/python2.7/dist-packages/MythTV/connections.py", line 295, in backendCommand
    self.socket.sendheader(data)
  File "/usr/lib/python2.7/dist-packages/MythTV/utility/other.py", line 392, in sendheader
    self.send(data, flags)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xdc' in position 531: ordinal not in range(128)

From ​https://github.com/MythTV/mythtv/blob/master/mythtv/bindings/python/MythTV/mythproto.py#L646

return self.backendCommand(BACKEND_SEP.join([command,program.toString()]))

[angelaschmid <angela.schmid@…>]

In e20bd8bf8e274274f4fb89420905015f57233e0c/mythtv:

Python binding - call Socket.send with non-unicode string

Socket.send takes a string (not unicode).
When Socket.send is called with an unicode string it tries to convert it with the ascii codec converter, resulting in an UnicodeEncodeError?.

Before calling Socket.send the data has to be converted to a non-unicode string (UTF-8 encoded).

Fixes #12529
Fixes #12642