[ticket/11253] Add migration to add auth check to UCP signature module

PHPBB3-11253
[ticket/11253] Fix typo in constant

PHPBB3-11253
[ticket/11253] Fix a few things brought up in the PR
[ticket/11253] Put AND clause in correct SQL query

PHPBB3-11253
[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().
Merge branch 'develop-olympus' into develop

# By Andreas Fischer
# Via Andreas Fischer (1) and Nathan Guse (1)
* develop-olympus:
  [ticket/11619] Use HTTP/1.0 because of lack of chunked-encoding handling.
  [ticket/11619] Some tests for get_remote_file().
Merge remote-tracking branch 'remotes/imkingdavid/ticket/11253' into develop

# By David King
# Via David King
* remotes/imkingdavid/ticket/11253:
  [ticket/11253] Put AND clause in correct SQL query
  [ticket/11253] Fix a few things brought up in the PR
  [ticket/11253] Fix typo in constant
  [ticket/11253] Add migration to add auth check to UCP signature module