Missed with r351447:

• Support stagedir
• Fix all leftovers Note that this depends on new Mk/Scripts/check_leftovers.sh added in r351446.
• Bump PORTREVISION in all ports due to plist being fixed.
• Support man.d on FreeBSD 9+
• Convert NOPORTDOCS
• Fix bad perl shebang for scripts/mkaliasdir
• Remove pkg-install and move all to pkg-plist
• Fix /var/qmail modified warning in poudriere by doing nothing in install-mtree
• Fix /var/qmail getting unpredictable/wrong permissions due to USERS/GROUPS changing for every user with HOME=/var/qmail
• Use more OPTIONS helpers
• Fix ccache support for spamcontrol patch building
• Fix build of SMTPEXTFORK in mail/qmail-spamcontrol with recent clang

Tested with: pkg and pkg_install