Add phpBB importer barebone
Export user groups (phpBB)
Export users (phpBB)
Merge branch 'master' into phpbb
Convert ip4 to ip6 (phpBB)

see: f134e84227345d29f70ae01f2862f3564ed4064b
Export ranks (phpBB)
Export follower (phpBB)
Export avatars (phpBB)
Export conversation folders (phpBB)
Export conversations (phpBB)
Export boards (phpBB)
Export threads (phpBB)
Export posts and fix some bugs (phpBB)
Properly export moved threads (phpBB)
Export locked posts (phpBB)
Use constants instead of magic numbers (phpBB)
Export polls (phpBB)
Add showOrder to poll option (phpBB)
Export smilies (phpBB)
Adapt phpBB to 11d1d741e90c80fedd919d09537672bdf7e54c79