[SA-14:25] Fix kernel stack disclosure in setlogin(2) / getlogin(2).
[SA-14:26] Fix remote command execution in ftp(1).

Approved by:	so (des)


git-svn-id: svn+ssh://svn.freebsd.org/base/head@274106 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f