Revert "do not substitute paths in manpages and configuration files, to let packagers put their wished paths."

This reverts commit 78e6bb6a6f00e91b8136273430e9cd84a0711782.
do not substitute paths in configuration file, to let packagers put their wished paths. As finaly requested in #326
remove unneeded stuff
Merge branch 'portable' of ssh://ssh.poolp.org/git/opensmtpd into portable