[ticket/11692] Don't update search_type in dev migration if already appended

PHPBB3-11692
[ticket/11694] Do not locate assets with root path

Do not locate assets that start with ./

PHPBB3-11694
Merge remote-tracking branch 'cyberalien/ticket/11694' into develop

* cyberalien/ticket/11694:
  [ticket/11694] Do not locate assets with root path
Merge pull request #1555 from EXreaction/ticket/11692

[ticket/11692] Don't update search_type in dev migration if already appended
[ticket/11698] Moving all autoloadable files to phpbb/

PHPBB3-11698
Merge pull request #1559 from naderman/ticket/11698

[WIP][ticket/11698] Moving all autoloadable files to phpbb/