[ticket/11619] Some tests for get_remote_file().

PHPBB3-11619
[ticket/11619] Use HTTP/1.0 because of lack of chunked-encoding handling.

PHPBB3-11619
Merge remote-tracking branch 'remotes/bantu/ticket/11619' into develop-olympus

# By Andreas Fischer
# Via Andreas Fischer
* remotes/bantu/ticket/11619:
  [ticket/11619] Use HTTP/1.0 because of lack of chunked-encoding handling.
  [ticket/11619] Some tests for get_remote_file().