Fix @dirrmtry in case PREFIX != LOCALBASE


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@367154 35697150-7ecd-e111-bb59-0022644237b5
Convert some @unexec to their proper equivalent in keyword


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@367155 35697150-7ecd-e111-bb59-0022644237b5
Remove extra %D


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@367156 35697150-7ecd-e111-bb59-0022644237b5
Remove now useless @exec


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@367157 35697150-7ecd-e111-bb59-0022644237b5