Fixed: The 'git pull' command is broken in limited shell.
PHP: Force 5.2 restart on upgrade if used.
Force Pure-FTPd restart on upgrade.
Fixed: FTPS (FTP over SSL) connections may experience TLS problems.
Fixed: The 'rsync' command is broken in limited shell.
Fix problems with PATH in the limited shell.
Not a bug: The drush @foo.com generate-makefile command may not work on some systems.

You have to specify target directory where you have write access to be able to use command like 'drush @foo.com generate-makefile ~/static/make.txt' because otherwise it will attempt to write it in the foo.com directory where only Aegir system user has write access. If you will specify only filename without correct path, it will trigger the mysterious 'Error: Call to undefined function drush_make_error()' which doesn't even exist in Drush, by the way.
Drush update.
Fixed:  The drush dl foo can't be run outside of site directory.
Changelog update.
Stable BOA-2.2.1 Release - Full Edition
PHP: Better default workers limits for the ondemand mode.
PHP: Better default workers limits for the ondemand mode.
PHP: Better default workers limits for the ondemand mode.
Changelog update.
Improve the csf firewall compatibility test.
Nginx: Prevent race conditions on Chive vhost access live update.
Nginx: Prevent race conditions on Chive vhost access live update (improved)
Fixed: The 'scp' command is broken in limited shell.
Known Issues on systems upgraded to BOA-2.2.1 (and 2.2.0) releases.