Improve Xsendfile tools, allow dump whenever the conf is disabled
Remove disk IO on media_subdef::get_size
Fix registration table name
Remove unused tables
Merge pull request #989 from romainneutron/cleanup-tables

[3.9] Remove unused tables
Merge pull request #986 from romainneutron/remove-disk-io

[3.8] Remove disk IO on media_subdef::get_size
Merge pull request #983 from romainneutron/xsendfilecommands

[3.8] Improve Xsendfile tools, allow dump whenever the conf is disabled
Merge pull request #988 from romainneutron/fix-registration-table-name

[3.9] Fix registration table name
Merge branch '3.8'
Cleanup API
Fix API environment
Bump to version 3.9.0-alpha.14