Recursively apply ACL on update

Change-Id: If020cf11bd9fbd33727f70dd69b6b770073eff79
Deploy the directory at install

Change-Id: I25e755f7b7e7d2297efde28dd1dbbf760365b9db
Do not create directory if already exists

Change-Id: I3949a64e07eb6211d6a59efcaa8cb6e1e2c158f0
Taking account of SFTP permissions on the web-ui

Change-Id: I6b55964250342fbc3d76629dc4105d323a37d1bc
Merge remote-tracking branch 'gerrit/5818_set_acl_filesystem' into tuleap-stable-master

Conflicts:
	plugins/proftpd/phpunit/ProFTPd/Admin/ACLUpdaterTest.php

Change-Id: I30c5d1f29250b981cae5d8fa7d14917be986fde9
Tuleap 6.9.99.48

Change-Id: I536052d86202b81627a3a0bb4cec24d9b6ba7d16