[ticket/10202] Implementation of config options with arbitrary length values.

PHPBB3-10202
[ticket/10202] Add database schema for phpbb_config_db_text.

PHPBB3-10202
[ticket/10202] Adjust method names to guidelines.

PHPBB3-10202
[ticket/10202] Add tests for phpbb_config_db_text.

PHPBB3-10202
[ticket/10202] Define phpbb_config_db_text as a service.

PHPBB3-10202
[ticket/10202] Add $this->db->sql_freeresult($result) to SELECT queries.

PHPBB3-10202
[ticket/10202] SQL escape the table name.

PHPBB3-10202
[ticket/10202] Improve method documentation.

PHPBB3-10202
[ticket/10202] Upgrade TEXT to the bigger MTEXT.

PHPBB3-10202
[ticket/10202] Add migration file for config_db_text.

PHPBB3-10202
[ticket/10202] Rename method names _all() to _array().

PHPBB3-10202
Merge remote-tracking branch 'remotes/bantu/ticket/10202' into develop

# By Andreas Fischer
# Via Andreas Fischer
* remotes/bantu/ticket/10202:
  [ticket/10202] Rename method names _all() to _array().
  [ticket/10202] Add migration file for config_db_text.
  [ticket/10202] Upgrade TEXT to the bigger MTEXT.
  [ticket/10202] Improve method documentation.
  [ticket/10202] SQL escape the table name.
  [ticket/10202] Add $this->db->sql_freeresult($result) to SELECT queries.
  [ticket/10202] Define phpbb_config_db_text as a service.
  [ticket/10202] Add tests for phpbb_config_db_text.
  [ticket/10202] Adjust method names to guidelines.
  [ticket/10202] Add database schema for phpbb_config_db_text.
  [ticket/10202] Implementation of config options with arbitrary length values.