Create a dedicated plugin to manage interaction with proftpd

Change-Id: Ib83575b066ac4203cb4d2010170a25490c74cfe9
Merge commit 'refs/changes/65/1665/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Create a dedicated plugin to manage interaction with proftpd

Change-Id: Iba0b120f6759f6947970b39b786ae03fe7ea927a
This is Tuleap 6.9.99.5

Change-Id: I05e8d15c1a1320832af7a0d635256899de83e82c
Add missing plugin entries

Change-Id: I045a664eb9e340ba663b413fc953beaf392f79f6